Home
Class 14
MATHS
An elevator descends into a mine shaft a...

An elevator descends into a mine shaft at the rate of `7.5` m/minute. If it descends from 35 m above ground, how long will it take to reach the mine that is 430 m below ground ?

A

A) `57.33` minutes

B

B) `66` minutes

C

C) `62` minutes

D

D) `52.67` minutes

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Similar Questions

Explore conceptually related problems

An elevator descends into a mine shaft at the rate of 6 m/min. If the descent starts from 20 m above the ground level, how long will it take to reach 370 m ?

An elevator descends into a mine shaft at the rate of 6min. If the descent starts from 10m above the ground level,how long will it take to reach 350m.

A multi storey building has 35 floors above the ground level each of height 7.5 m. It also has 3 floors in the basement each of height 5 m. A lift in building moves at a rate of 1 m/s. If a man starts from 50 m above the ground, how long will it take him to reach at 3rd floor of basement? A. 40 sec B. 65 sec C. 68 sec D. 32 sec

A multistorey building has 25 floors above the ground level each of height 5m. It also has 3 floors in the basement each of height 5m. A lift in building moves at a rate of 1m/s. If a man starts from 50m above the ground, how long will it take him to reach at 2nd floor of basement?

A hoodlum throms a stone vertically downward with an initial speed of 15.0 m/s from the roof of a building, 30.0 m above the ground. (a) How long does it take the stone to reach the ground ? (b) What is the speed of the stone at impact ?

A balloon is ascending at the rate of 9.8 m//s and is 39.2 m above the ground when a package is dropped. (a) How long does the package take to reach the ground? (b) with what speed does it hit the ground ? (g = 9.8 m//s^(2))

Suppose we reoresent the distance above the ground by a positive integer and that below the ground by a negative integer, then answer the following : An elevator descends into a mine shaft at the rate of 5 metre per minute. What will be its be its position after one hour ?