Question

Each square block in the image has an area of 100 sq m. If Amara takes the shortest possible route, how much less distance will she cover as compared to the black route?

• A. 10 m
• B. 20 m
• C. 80 m
• D. 12 m

Answer 1

The correct option is B 20 m

Area of each square = 100 sq m

Therefore,
Side x Side = 100
${\text{Side}}^2$ = 100
Side = 10 m

Total length of the black route = 10 x 10 = 100 m.

The shortest distance Amara will cover = 80 m.
(Turning left and walking along 5 blocks in that direction and then turning right and walking along 3 blocks in that direction will trace one such shortest path).

Difference = 100 - 80 = 20 m.