Mathematics
Grade-7
Easy

Question

An elevator descends into a mine shaft from 3 6 over 10 above the ground level. If it goes 8 6 over 10 m below the ground level, find the distance covered by the elevator.

  1. 12.0
  2. 12.1
  3. 12.2
  4. 12.4

hintHint:

In this question we will simply add the distance covered by lift above the ground level and distance below the ground.

The correct answer is: 12.2


    STEP BY STEP SOLUTION
    Lift distance above ground = 3 6 over 10
    Lift distance below the ground = -8 6 over 10
    To calculate the total distance covered by life we will simple add the the distance below the ground and distance above the ground
    Distance covered by lift = 3 6 over 10 plus open vertical bar negative 8 6 over 10 close vertical bar equals 3 6 over 10 plus 8 6 over 10 equals 3.6 plus 8.6 equals 12.2
    So the total distance covered by lift = 12.2 units

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