An elevator goes down at the rate of 3 m per minute. If it starts going down from a height of 20 m above the ground level, find the time taken by the elevator to reach 100 m below the ground level. (Consider the distance above the ground level to be a positive integer and that below the ground level by a negative integer.)
Answers
Answer:
PLZ FOLLOW ME AND MARK THIS ANS AS BRAINLIEST
Step-by-step explanation:
Total distance covered from A to C =12+468=480 m
Speed =8 m/min
Therefore, time =
Speed
Total distance covered
time=
8
480
=60 minutes.
Question:
An elevator goes down at the rate of 3 m per minute. If it starts going down from a height of 20 m above the ground level, find the time taken by the elevator to reach 100 m below the ground level.
(Consider the distance above the ground level to be a positive integer and that below the ground level by a negative integer.)
Answer:
40 minutes.
Step-by-step explanation:
Initial position of the elevator will be represented by 20. (Since it is 20 m above the ground level)
Final position of the elevator will be represented by −100. (Since it is 100 m below the ground level)
The distance elevator goes down in one minute is 3 m which will be represented by −3.
Time taken by the elevator = ( Final position − Initial position) ÷ Rate at which it goes down.
[−100−20]÷(−3)
= (−120)÷(−3)
= 40
Hence, the elevator will reach 100 m below the ground level after 40 minutes.
( Answered By Manan Khurma - Teacher ) , ( Answer Written By Kiran )
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