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- Three sirens wail at intervals of thirty minutes, fifty minutes and thirty-five minutes. If they wail together at 7.18 a.m. on
Monday, what time and day...(Solved)
Three sirens wail at intervals of thirty minutes, fifty minutes and thirty-five minutes. If they wail together at 7.18 a.m. on
Monday, what time and day will they wail together?
Date posted: April 24, 2019. Answers (1)
- Find the value of x if(Solved)
Find the value of x if
Date posted: April 24, 2019. Answers (1)
- Without using a calculator or mathematical tables simplify.(Solved)
Without using a calculator or mathematical tables simplify.
Date posted: April 24, 2019. Answers (1)
- Evaluate without using a calculator.(Solved)
Evaluate without using a calculator.
Date posted: April 24, 2019. Answers (1)
- A circular lawn is surrounded by a path of a uniform width of 7 meters. The area of the path is 21% that of the...(Solved)
A circular lawn is surrounded by a path of a uniform width of 7 meters. The area of the path is 21% that of the lawn. Calculate the radius of the lawn.
Date posted: April 23, 2019. Answers (1)
- A liquid spray of 384g is packed in a cylinder container of internal radius 3.2cm. Given that the density of the liquid is 0.6g/cm3, calculate...(Solved)
A liquid spray of 384g is packed in a cylinder container of internal radius 3.2cm. Given that the density of the liquid is 0.6g/cm3, calculate to 2 decimal places the height of the liquid in the container
Date posted: April 21, 2019. Answers (1)
- Mueni bought maize and beans at sh 20 per kg and sh 50 per kg respectively. She mixed them in a ratio such that after...(Solved)
Mueni bought maize and beans at sh 20 per kg and sh 50 per kg respectively. She mixed them in a ratio such that after selling the mixture at sh 39 per kg, she made a profit of 50%. Find the ratio in which she mixed them.
Date posted: April 6, 2019. Answers (1)
- Two towns P(60° N, 15° W) and Q(60°N, 30°E) are on the same parallel of latitude. An aircraft flying along the parallel of latitude takes...(Solved)
Two towns P(60° N, 15° W) and Q(60°N, 30°E) are on the same parallel of latitude. An aircraft flying along the parallel of latitude takes 4 hours 10 minutes to fly from P to Q. Taking the radius of the earth to be 6370 km, calculate to the nearest whole number,
i)the distance covered by the aircraft from P to Q
ii)the speed of the aircraft.
Date posted: April 6, 2019. Answers (1)
- The model of an aircraft is designed such that the volume of it interior airspace is 125 cm2. The volume of airspace of the actual...(Solved)
The model of an aircraft is designed such that the volume of it interior airspace is 125 cm2. The volume of airspace of the actual aircraft is 3.375 litres.
a) Given that the wing span of the aircraft is 7.44 m, find the wingspan of the model in centimetres.
b)If the total surface area of the model is 2420 cm2, find the total surface area of the actual aircraft in square metres.
c) Calculate the cost of the material used to build the actual aircraft if the material costs US $ 2.5 per square centimetre.
Date posted: April 6, 2019. Answers (1)
- A sales lady sold four plots at sh.180000@,she was paid a commission of sh.54000.What percentage commission that she...(Solved)
A sales lady sold four plots at sh.180000@,she was paid a commission of sh.54000. What percentage commission that she was paid?
Date posted: April 6, 2019. Answers (1)
- A cold water tap can fill a bath in 6 minutes while a hot water tap can fill it in 12 minutes. The drainage pipe...(Solved)
A cold water tap can fill a bath in 6 minutes while a hot water tap can fill it in 12 minutes. The drainage pipe can empty the bath in 8 minutes. All the three are opened fully for 3 minutes and then hot water tap is closed. How many more minutes will it take to fill the bath?
Date posted: April 3, 2019. Answers (1)
- An estate is drawn to scale on a grid of 1 cm squares with a total area of 35 cm2 .If the actual area of...(Solved)
An estate is drawn to scale on a grid of 1 cm squares with a total area of 35 cm2 .If the actual area of the estate is 560 hectares, calculate the linear scale of the map.
Date posted: April 3, 2019. Answers (1)
- Use the method of completing the square to solve the quadratic equation
2x2 - 13x + 15 = 0
(Solved)
Use the method of completing the square to solve the quadratic equation
2x2 - 13x + 15 = 0
Date posted: April 3, 2019. Answers (1)
- The sum of the first 8 terms of an AP is 236 and the sum of the first 6 terms of the same series is...(Solved)
The sum of the first 8 terms of an AP is 236 and the sum of the first 6 terms of the same series is 147. Find the sum of the first 12 terms of the series.
Date posted: April 3, 2019. Answers (1)
- A mixed day and boarding secondary school has a student depositions population of 630. The ratio of girls to boys is 3:4. The school has...(Solved)
A mixed day and boarding secondary school has a student depositions population of 630. The ratio of girls to boys is 3:4. The school has 350 boarders some of whom are boys and others are girls. A student is picked at random from the school. Find the probability that the student is
a) a boarder
b) a girl and not a boarder.
Date posted: April 3, 2019. Answers (1)
- Juma deposited sh 16000 in a bank which paid compound interest at the of 12 percent per annum. At the end of five years, he...(Solved)
Juma deposited sh 16000 in a bank which paid compound interest at the of 12 percent per annum. At the end of five years, he withdrew all his money. Determine how much money he withdrew.
Date posted: April 3, 2019. Answers (1)
- Describe the procedure to be followed when constructing ungrouped frequency distribution table(Solved)
Describe the procedure to be followed when constructing ungrouped frequency distribution table.
Date posted: April 3, 2019. Answers (1)
- To transport 100 people and 3500 kg to a wedding a company has type A vehicles which take 10 people and 200kg each and type...(Solved)
To transport 100 people and 3500 kg to a wedding a company has type A vehicles which take 10 people and 200kg each and type B which take 6 people and 300kg each. They must not use more
than 16 vehicles all together.
(a) Write down 3 inequalities in A and B which are the number of vehicles used and plot them
in a graph.
(b) What is the smallest number of vehicles he could use.
(c) Hire charge for type A is Sh.1000 while hire for type B is Sh.1200 per vehicle. Find the cheapest
hire charge for the whole function
Date posted: March 29, 2019. Answers (1)
- Chalk box x has 2 red and 3 blue chalk pieces. Box Y has same number of red and blue
pieces. A teacher picks 2 pieces...(Solved)
Chalk box x has 2 red and 3 blue chalk pieces. Box Y has same number of red and blue
pieces. A teacher picks 2 pieces from each box. What is the probability that
(a) They are of the same colour.
(b) At least one is blue
(c) At most 2 are red
Date posted: March 29, 2019. Answers (1)
- OAB is a triangle with OA = a , OB = b. R is a point of AB. 2AR = RB. P is on OB...(Solved)
OAB is a triangle with OA = a , OB = b. R is a point of AB. 2AR = RB. P is on OB such that 3OP = 2PB. OR and AP intersect at Y, OY = m OR and AY = nAP. Where m and n are scalars. Express in terms of a and b.
(i) OR
(ii)AP
(b) Find the ratio in which Y divides AP
Date posted: March 29, 2019. Answers (1)