An elevator descends into a mine shaft at the rate of 6 meters per minute. If the descends starts from 10m above the ground level, how long will it take to reach -350m.

A lift descends into an underground floor at the rate of 6 meters per minute If the decent starts from 10 meters above the ground level,how much time will it take to descend 350 meters ?

Water is pouring into a cuboidal reservoir at the rate of 60 litres per minute. If the volume of reservoir is 108 m^3 . Find the number of hours it will take to fill the reservoir.

A tree grows at the rate of 0.5 m per year. What will be the height of board fixed at 1.5 m above the ground level five years ago?

Amonkey of mass 15kg is climbing on a rope with one end fixed to the ceiling. If it wishes to go up with an acceleration of 1m//s^2 , how much force should it apply to the rope ? If the rope is 5m long and the monkey starts from rest, how much time will it take to reach the ceiling ?

A particle is projected from the ground with some initial velocity making an angle of 45^(@) with the horizontal. It reaches a height of 7.5 m above the ground while it travels a horzontal distance of 10 m from the point of projection . Find the initial speed of projection ( g = 10 m//s^(2) ) .