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

Answer 1

Answer:

Step-by-step explanation:

Solution : 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.

Answer 2

Answer:

postive is our life

Step-by-step explanation:

negative of our life