Question

If a man takes 20 sec to complete a round at the speed of 20km/hr around a square ground, then what is the area of the ground (in hectares)

Answer 1

Answer:

THE CORRECT ANSWER IS 0.031 hectares.

Step-by-step explanation:

The distance travelled by the man is

Distance travelled = speed × time

= (20×1000)m/ 3600s × 20

= 10/9 × 20 = 200/9

This will be equal to the perimeter of the square. Let 'a' be the side of the square.

∴ 4a = 200/9

or, a = 50/9

Area of the square shaped ground is,

a×a = (50×50)/9×9 = 2500/81 sq. meter.

= 2500/81 × 0.001 hectares

= 2.5/81 hectares

=0.031 hectares

HOPE THIS WILL HELP YOU.