CBSE Class 7 Answered
An elevator descends into a mine shaft at the rate of 9 m per minute. If the descent starts from 20 m above the ground level how long will it take to reach -250 m?
Asked by Sikerwar_Indore | 18 Sep, 2018, 08:36: PM
Expert Answer
If the descent starts from 20 m above the ground level how long will it take to reach -250 m?
The distance to be descended by the elevator = (-250) - (+20) = - 270 m
rate =
- 9 = (-270) ÷ x
Therefore x = (-270) ÷ (-9)= 30 minutes
Answered by Yasmeen Khan | 19 Sep, 2018, 02:56: PM
Concept Videos
CBSE 7 - Maths
Asked by shouryavijay0020012 | 17 Apr, 2024, 03:45: PM
ANSWERED BY EXPERT
CBSE 7 - Maths
Asked by archanansingh89 | 14 Apr, 2024, 03:01: PM
ANSWERED BY EXPERT
CBSE 7 - Maths
Asked by pakshat261 | 14 Apr, 2024, 01:27: PM
ANSWERED BY EXPERT
CBSE 7 - Maths
Asked by dineshsinghdhan9 | 11 Apr, 2024, 11:06: AM
ANSWERED BY EXPERT
CBSE 7 - Maths
Asked by nabamallikasaikia346 | 11 Apr, 2024, 08:45: AM
ANSWERED BY EXPERT
CBSE 7 - Maths
Asked by bpadhee | 08 Apr, 2024, 08:51: PM
ANSWERED BY EXPERT
CBSE 7 - Maths
Asked by nutansharma22011 | 08 Apr, 2024, 06:13: PM
ANSWERED BY EXPERT
CBSE 7 - Maths
Asked by kumbharbabu63 | 06 Apr, 2024, 12:08: PM
ANSWERED BY EXPERT