Question

An elevator descends into a mine shaft at the rate of 6 m/min. If the descent starts from 10 m above the ground level, how long will it take to reach – 350 m.

Answer 1

Find the total distance it needs to travel:

Distance = 10m + 350m = 360 m

Find the time needed:

6 m = 1 min

1 m = 1/6 min

360 m = 1/6 x 360 = 60 mins = 1 hour

Answer: It takes 1 hours to reach 350 m underground.