Question

An elevator is 12 meters below the ground . It descends to a point 100 meters below the ground. What is the change in the elevation of the elevator?




Answer : -88 meters



Please tell me step by step explanation. ​

Answer 1

Step-by-step explanation:

Elevator was 12 m below ground

Elevator reached to a point 100m below ground

Change in elevation =?

Below ground = -100-(-12)

=-100+12=-88 meters

Answer 2

Given,

An elevator is 12 meters below the ground . It descends to a point 100 meters below the ground.

To Find,

What is the change in the elevation of the elevator?

Solution,

Here, we have

Elevator was 12 m below ground

⇒ Point A = -12

Elevator reached to a point 100m below ground

⇒ Point B = -100

Change in elevation = Point B - Point A

                                  = -100 - (-12)

                                  = -100 + 12

                                  = -88 meters

Hence, there is a change of -88 metres in the elevation of the elevator.