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

Given:

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$.$

To find:

how long will it take to reach -350 m.

STEP BY STEP EXPLANATION:

Distance descended is denoted by a negative integer.

Initial height = +10 m

Final depth = -350 m

Total distance to be descended by the elevator = (-350) - (+10) = -360 m

Time taken by the elevator to descend -6 m 1 min

Thus, time taken by the elevator to descend -360 m = (-360) = (-6)

= 60 minutes = 1 hour

∴ it will take 1 hour

Hence verified !