Average speed = total distance /total time
Total distance = (3 x60) + (5/2 x40)
= 580 km
Total time = (3 + ½ +2 ½ )
=6 hrs
Average speed = (580/6 )
=96.67 km/h
joseph rimiru answered the question on October 10, 2017 at 13:58
- John cycle for 3.5 hours to chaka trading centre, 40 km away from his home. He took a matatu to a town 200 km moving...(Solved)
John cycle for 3.5 hours to chaka trading centre, 40 km away from his home. He took a matatu to a town 200 km moving at the speed of 60km/ h and back to chaka. He finally cycled home at an average speed 10km/ h. find the average speed for the whole journey.
Date posted: October 10, 2017. Answers (1)
- A woman walks for 50 minutes at 50 km/hr. she then took a matatu traveling at 70 km/hr for 3 hours. Finally she traveled using...(Solved)
A woman walks for 50 minutes at 50 km/hr. she then took a matatu traveling at 70 km/hr for 3 hours. Finally she traveled using a motor cycle for one hour moving at 50 km/hr. Find her speed for the whole journey.
Date posted: October 10, 2017. Answers (1)
- Mary was running at 10 km/hr when she overtook Jane who was moving at 7 km/hr. At what speed did Mary appear to be running...(Solved)
Mary was running at 10 km/hr when she overtook Jane who was moving at 7 km/hr. At what speed did Mary appear to be running according to Jane?
Date posted: October 9, 2017. Answers (1)
- A vehicle traveling at 80 km/hr met a person running at 20 km/h. what was the relative speed of the person to the vehicle?(Solved)
A vehicle traveling at 80 km/hr met a person running at 20 km/h. what was the relative speed of the person to the vehicle?
Date posted: October 9, 2017. Answers (1)
- A motor cyclist riding at 50 km/hr is overtaken by a matatu travelling at 120 km/hr. what is the relative speed of the bus to...(Solved)
A motor cyclist riding at 50 km/hr is overtaken by a matatu travelling at 120 km/hr. what is the relative speed of the bus to the motor cyclist?
Date posted: October 9, 2017. Answers (1)
- Convert an acceleration of 12 km/hr^2 in m/s^2.(Solved)
Convert an acceleration of 12 km/hr^2 in m/s^2.
Date posted: October 9, 2017. Answers (1)
- Express an acceleration of 60 m/s in km/hr^2(Solved)
7. Express an acceleration of 60 m/s in km/hr^2
Date posted: October 9, 2017. Answers (1)
- A body moving at 60 m/s in a straight path accelerated at 16 m/s^2 for 12 seconds. What is its final velocity?(Solved)
A body moving at 60 m/s in a straight path accelerated at 16 m/s^2 for 12 seconds. What is its final velocity?
Date posted: October 9, 2017. Answers (1)
- A vehicle accelerated at 24 m/s^2 to reach a velocity of 230 m/s in 6 s. What was its initial velocity?(Solved)
A vehicle accelerated at 24 m/s^2 to reach a velocity of 230 m/s in 6 s. What was its initial velocity?
Date posted: October 9, 2017. Answers (1)
- A matatu takes 10 seconds to cross a bridge 50 metres long. Calculate its speed in km/hr.(Solved)
A matatu takes 10 seconds to cross a bridge 50 metres long. Calculate its speed in km/hr.
Date posted: October 9, 2017. Answers (1)
- What is the mass of a hemisphere made of gold, 7 cm in diameter and density of 19.g/cm^3?(Solved)
What is the mass of a hemisphere made of gold, 7 cm in diameter and density of 19.3 g/cm^3?
Date posted: October 9, 2017. Answers (1)
- A ladder 4.9 m is placed against a wall. If its foot is 2.4 m from the wall, how high up the wall does it...(Solved)
A ladder 4.9 m is placed against a wall. If its foot is 2.4 m from the wall, how high up the wall does it reach?
Date posted: October 9, 2017. Answers (1)
- A triangle has the following dimensions 7cm, 5cm, and 11 cm. Find out whether it is right angled.(Solved)
A triangle has the following dimensions 7cm, 5cm, and 11 cm. Find out whether it is right angled.
Date posted: October 9, 2017. Answers (1)
- Solve the equations
a. 4 x^2 = 64 b. 3^(2x+1 ) = 81
(Solved)
Solve the equations
a. 4 x^2 = 64 b. 3^(2x+1 ) = 81
Date posted: October 9, 2017. Answers (1)
- Kombo is 5 years older than his brother kande. Their age add up to 33. How old is each of them?(Solved)
Kombo is 5 years older than his brother kande. Their age add up to 33. How old is each of them?
Date posted: October 8, 2017. Answers (1)
- Solve the following:1+2+3+4(1+2+3+4)(Solved)
Solve the following:1+2+3+4(1+2+3+4)
Date posted: October 8, 2017. Answers (1)
- On a valentines day in an office, each worker gave out gave out a flower. If there were 12 members,how many flowers were given out on that day?(Solved)
On a valentines day in an office, each worker gave out gave out a flower. If there were 12 members,how many flowers were given out on that day?
Date posted: October 7, 2017. Answers (1)
- If A (5 ,4) and B is (9 ,14). Find without plotting
i. The coordinates of the mid-point of AB
ii. The magnitude
(Solved)
If A (5 ,4) and B is (9 ,14). Find without plotting
i. The coordinates of the mid-point of AB
ii. The magnitude
Date posted: October 7, 2017. Answers (1)
- Find the median of the following number 7,5, 3, 2, 1, 6, 7,7,8(Solved)
Find the median of the following number 7,5, 3, 2, 1, 6, 7,7,8
Date posted: October 7, 2017. Answers (1)
- The mean mark scored by five students in a chemistry test was 20. 16,18,19 and 15 were marks scored by 4 students . find the...(Solved)
The mean mark scored by five students in a chemistry test was 20. 16,18,19 and 15 were marks scored by 4 students . find the mark for the 5th student.
Date posted: October 7, 2017. Answers (1)