Question

an elevator decends into a mine shaft at the rate of 5 metre per minute if it starts 10 metre above the ground how long it will take to reach -290 m​

Answer 1

Answer:

Ncert solutions

Grade 7

Mathematics

Science

Chapters in NCERT Solutions - Mathematics, Class 7

Exercises in Integers

Question 7

Q7) 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

Transcript

Solution 7:

Starting position of mine shaft is = 10m above ground

but,

it moves in opposite direction so it travels the distance (-350 m ) below the ground.

Total distance covered by mine shaft = 10m - (-350m)

= 10 + 350

= 360m

Now, taken to cover a distance of 6m b