how is the position of a particle moving along a straight line described by a number ? how is the direction of motion specified by the number describing position ?
in the here tortoise race, the hare Ran for 2 minute at a speed of 7.5 km/hr slept for 56 minute and again Ran for 2 minute at a speed of 7.5 km/h. find the average speed of hare in the race.