Home
Class 14
MATHS
A jogger desires to run a certain course...

A jogger desires to run a certain course in `1/4` less time than he usually takes. But what per cent must be incresase his average running speed to accomplish the goal ?

A

`50%`

B

`20%`

C

`25%`

D

`33(1)/(3)%`

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Similar Questions

Explore conceptually related problems

The average of runs of a cricket player of 10 innings was 32. How many runs must he make in his next inning so as to increase his average of runs by 4?

A cricketer has a certain average of 10 innings. In the eleventh inning he scored 108 runs, thereby increasing his average by 6 runs. What is his new average ?

A boat running upstream takes 8 hours 48 minutes to cover a certain distance , while it takes 4 hours to cover the same distance running downstream . What is the ratio between the speed of the boat and speed of water current respectively ?

A boat running upstream takes 8 hours 48 minutes to cover a certain distance, while it takes 4 hours to cover the same distance running downstream. What is the ratio between the speed of the boat and speed of the water current respectively?

A soccer ball is kicked from the ground with an initial speed of 21.3 m/s at an upward angle of 45^(@) . A player 55 m away in the direction of the kick starts running to meet the ball at that instant. What must be his average speed if he is to meet the ball just before it hits the ground?

Walking at three - fourth of his usual speed , a man covers a certain distance in 2 hour more than the time he takes to cover the distance at his usual speed. What is the time taken by him to cover the same distance with his usual speed?