# 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

**Solution:**

Total distance covered by an elevator = 10 - (-350) m

= 10 + 350

= 360 m

Time taken to cover a distance of 6 m = 1 min

Therefore, time taken to cover 360 m = 360 ÷ 6

= 60 minutes

= 1 hour (1 hour = 60 minutes)

Thus, the elevator will reach -350 m from 10 m in 1 hour.

**☛ Check: **NCERT Solutions Class 7 Maths Chapter 1

**Video Solution:**

## 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

NCERT Solutions Class 7 Maths Chapter 1 Exercise 1.4 Question 7

**Summary:**

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, it will reach -350 m from 10 m in 1 hour.

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