The sprinter must run in the _____ allotted to him.

A train covers a distance in 50 min, if it runs at a speed of 48 km/h on an average. The speed at which the train must run to reduce the time of journey to 40 min is

To gain 25% after allowing a discount of 10%, the shopkeeper must mark the price of the article which costs him Rs 360 as

A sprinter is running along the circumference of a big sports stadium with constant speed. Which of the following do you think is changing in this case ?

A hunderd metre sprinter increases her speed from rest uniformly at the rate of 1ms^(-2) upto three quarters of the total run and covers the last quarter with uniform speed. How much time does she take to cover the first half and the second half of the run?