Question

Area of a square field is 35721m square
. A man is walking along it's boundary at a speed of 12km/hr. In how much time will he complete four rounds along the boundary

Answer 1

Answer:

Area of square = side² = 35721m²

                        ⇒ side = √35721 = 189m

Perimeter of square = 4*side = 4*189 = 756m (total distance for one complete round)

speed = 12 km/hr     ⇒12×5/18 m/sec = 3.33 m/sec

speed = distance / time

⇒time = dist/speed ⇒⇒ 756/3.33 = 227 seconds → for one complete round

∴ time required for completing 4 rounds = 4* 227 = 908 secs...

that is 908/60 = 15.12 mins

hope it helps... :)

Step-by-step explanation:

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