Question

an elevator descents into a mine shaft at the rate of 6m/min .if the descent starts from 20 metre above the ground level ,how long will it take reach -370 metre ?

Answer 1

Answer:

Given that the elevator starts its descent from 20 m above the ground level, to reach -340 m , it has to cover a distance of (20 + 340) = 360 m . Since the speed is 6m/min , time taken to reach -340 m = 360/6 = 60 min or 1 hr p explanation: