Marked price = sh 10 000 after a
15% discount.
Selling price = $\frac{85}{100}$ x 100
= sh 8 500
sh 8 500 has a profit of 25%
8 500 represents 125% of cost
price. Cost price of the radio is
sh 6 800
johnmulu answered the question on June 8, 2017 at 12:41
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A two digit number is such that the sum of the ones and the tens digit is 10. If the digits are reversed, then the new number formed exceeds the original number by 54. Find the number.
(Solved)
A two digit number is such that the sum of the ones and the tens digit is 10. If the digits are reversed, then the new number formed exceeds the original number by 54. Find the number.
Date posted:
June 8, 2017
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Answers (1)
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There are unspecified number of cows and hens in a den. If there are a total of 30 heads and 80 legs in the den, find the number of cows and hens in the den.
(Solved)
There are unspecified number of cows and hens in a den. If there are a total of 30 heads and 80 legs in the den, find the number of cows and hens in the den.
Date posted:
June 8, 2017
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Answers (1)
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A man is now three times as old as the daughter. In 12 years times he will be twice as old as his daughter. Find their present ages.
(Solved)
A man is now three times as old as the daughter. In 12 years times he will be twice as old as his daughter. Find their present ages.
Date posted:
June 8, 2017
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Answers (1)
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Three years ago, a father was three times as old as his son. In three years time, the sum of their ages will be 76 years. Determine their present ages.
(Solved)
Three years ago, a father was three times as old as his son. In three years time, the sum of their ages will be 76 years. Determine their present ages.
Date posted:
March 10, 2017
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Answers (1)
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A metal P is an alloy of two metals Q and R. Metal Q has a mass of 70 g and a density of 16 g/cm3. Metal R has a mass of 19 g and a density of 4 g/cm3. Find the density of the alloy
(Solved)
A metal P is an alloy of two metals Q and R. Metal Q has a mass of 70 g and a density of 16 g/cm3. Metal R has a mass of 19 g and a density of 4 g/cm3. Find the density of the alloy.
Date posted:
March 10, 2017
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Answers (1)
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Simplify:
$\frac{(6a + b)(a+ b) - 7b(a + b)}{2a^2 - 2b^2}$
(Solved)
Simplify:
$\frac{(6a + b)(a+ b) - 7b(a + b)}{2a^2 - 2b^2}$
Date posted:
March 9, 2017
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Answers (1)
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A stone is thrown vertically upwards such that its height is S metres above the ground after t seconds is given by s = 40t - 10t2.
Find
(Solved)
A stone is thrown vertically upwards such that its height is S metres above the ground after t seconds is given by s = 40t - 10t2.
Find
i) The height above the ground after 2 seconds
ii) The velocity after 1 second
iii) The instant at which the stone is 30 m high
Date posted:
March 8, 2017
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Answers (1)
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A solid cone of height 12 cm and radius 9 cm is recast into a solid sphere. Calculate the surface area of the sphere
(Solved)
A solid cone of height 12 cm and radius 9 cm is recast into a solid sphere. Calculate the surface area of the sphere
Date posted:
March 8, 2017
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Answers (1)
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The sides of triangles were measured and recorded as 8.4 cm, 10.5 cm and 15.3 cm. Calculate the percentage error in perimeter
(Solved)
The sides of triangles were measured and recorded as 8.4 cm, 10.5 cm and 15.3 cm. Calculate the percentage error in perimeter correct to 2 decimal places
Date posted:
March 7, 2017
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Answers (1)
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The equation of a curve is
y = 3x2 -4x + 1, Find the gradient function of the curve and its value when x = 2
(Solved)
The equation of a curve is
y = 3x2 -4x + 1
a) Find the gradient function of the curve and its value when x = 2
b) Determine the equation of the tangent to the curve at(2,5)
Date posted:
March 7, 2017
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Answers (1)
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A man accumulates sh 71 105 after investing sh 50 000 at a rate of 18% p.a. compounded quarterly. Find the time in years taken to accumulate the amount
(Solved)
A man accumulates sh 71 105 after investing sh 50 000 at a rate of 18% p.a. compounded quarterly. Find the time in years taken to accumulate the amount
Date posted:
March 7, 2017
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Answers (1)
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A bus left Nairobi at 8. 00 a.m and travelled towards Kisumu at an average speed of 80 km/hr.
(Solved)
A bus left Nairobi at 8. 00 a.m and travelled towards Kisumu at an average speed of 80 km/hr. At 8.30 a.m a car left Kisumu towards Nairobi at an average speed of 120 km/hr. Given that the distance between Nairobi and Kisumu is 400 km, calculate.
a) The time the car arrived in Nairobi
b) The time the two vehicles met
c) The distance from Nairobi to the meeting point
Date posted:
March 7, 2017
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Answers (1)
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A man deposits his money in a saving bank on monthly basis. Each deposit exceeds the previous by sh 750. If he deposited sh 1500 initially,
(Solved)
A man deposits his money in a saving bank on monthly basis. Each deposit exceeds the previous by sh 750. If he deposited sh 1500 initially, how much money will he have deposited in 12 months
Date posted:
March 7, 2017
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Answers (1)
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A farmer has 1 200 m wire to fence three sides of a rectangular paddock. The fourth side is a wall. Find the dimensions that will give the maximum possible area.
(Solved)
A farmer has 1 200 m wire to fence three sides of a rectangular paddock. The fourth side is a wall. Find the dimensions that will give the maximum possible area.
Date posted:
March 7, 2017
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Answers (1)
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Solve for x in
log(x + 5) = log 4 - log(x + 2)
(Solved)
Solve for x in
log(x + 5) = log 4 - log(x + 2)
Date posted:
March 6, 2017
.
Answers (1)
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Three years ago a father was three times as old as his son. In three years time, the sum of their ages will be 76 years.
(Solved)
Three years ago a father was three times as old as his son. In three years time, the sum of their ages will be 76 years. Determine their present ages.
Date posted:
March 6, 2017
.
Answers (1)
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A plan of a house is drawn on a scale 1:500, What is the length of a room on the plan for which the actual length is 8 meters
(Solved)
A plan of a house is drawn on a scale 1:500
a) What is the length of a room on the plan for which the actual length is 8 meters
b) The area of the room on the plan is 1.28 cm2. What is the actual area of the room in m2
Date posted:
March 6, 2017
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Answers (1)
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A map is drawn to a scale of 1: 50 000 on the map, the area of a town is 4 cm2. Calculate the actual area of the town in hectares.
(Solved)
A map is drawn to a scale of 1: 50 000 on the map, the area of a town is 4 cm2. Calculate the actual area of the town in hectares.
Date posted:
March 6, 2017
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Answers (1)
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Simplify $\frac{2x^2 – 3xy – 2y^2}{4x^2 – y^2}$
(Solved)
Simplify $\frac{2x^2 – 3xy – 2y^2}{4x^2 – y^2}$
Date posted:
March 6, 2017
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Answers (1)
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The numerator of a fraction is three less than the denominator. When both the numerator and the denominator are increased by 5, the fraction becomes $\frac{5}{6}$. Find the original fraction
(Solved)
The numerator of a fraction is three less than the denominator. When both the numerator and the denominator are increased by 5, the fraction becomes $\frac{5}{6}$. Find the original fraction
Date posted:
March 6, 2017
.
Answers (1)