Get premium membership and access questions with answers, video lessons as well as revision papers.
Total distance = (100 x2) + (X x 1 ½)
Total time = (2 + 1 ½ )hrs
Average speed = total distance /total time
90 = (100 x2) + (X x 1 ½)/(2 + 1 ½ )hrs
Solve the value of X =73 ½ km/h
joseph rimiru answered the question on October 10, 2017 at 14:04
- Jane usually takes 3 hours to walk from home to her work place, a distance of 9 km on one Monday she spent 10 minutes...(Solved)
Jane usually takes 3 hours to walk from home to her work place, a distance of 9 km on one Monday she spent 10 minutes in a shop on her way to work after walking for 30 minutes. At what average speed should she walk to reach on time.
Date posted: October 10, 2017. Answers (1)
- Dan traveled from two towns A and B which are 50 km apart. He used a bike at a speed of 20km/h for 1 ½...(Solved)
Dan traveled from two towns A and B which are 50 km apart. He used a bike at a speed of 20 km/h for 1 ½ hours and then walked for the remaining distance at speed of 2 km/h. Find average speed for the journey.
Date posted: October 10, 2017. Answers (1)
- A tricycle traveled for 3 hours at a speed of 60 km/h before it broke down. It took half an hour to repair it. It...(Solved)
A tricycle traveled for 3 hours at a speed of 60 km/h before it broke down. It took half an hour to repair it. It resume the journey for 2 ½ hours at a speed of 40 km/h.
What was its average speed?
Date posted: October 10, 2017. Answers (1)
- 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)