Question

A lift travel at the rate of 4m/sec .If the descent start from 20m above the ground level ,how long will it take to reach-220m?​

Answer 1

Answer:

Time = Distance / Speed

The lift will take 50 seconds to reach 220 m.

Answer 2

Step-by-step explanation:

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 by it = 1 minute

Time taken to cover a distance of 1m by it = \frac{1}{6\ }\min

Therefore, tie taken to a cover a distance of 360m = \frac{1}{6}\times\ 360\ =\ 60\ \min\ \

60 minutes = 1 hour

thus, in one hour the mine shraft reaches = 350 below the ground.