Question

An elevator decends into a mine shaft at the rate of 13m/min.If the decends starts from 20m above the ground level, how long will it take to reach -240m?
please solve this question​

Answer 1

Answer:

Here, since the descend starts from 20 m above ground level,

the elevator will have to cover an extra distance of 20m.

So, total distance = 370 + 20 = 390 m.

Hence, time required to go 370 m below ground level when the elevator starts from 20 m above, is 65 minutes or 1 hour and 5 minutes.