Question

The area of a square field is 60025msq . A man cycles along it's boundary at 18 km/hr.find the time taken by him to reach the starting point

Answer 1

area of square = (side)²
60025 = (side)²
side = √60025 = 245 m

now, perimeter = side×4 = 245×4 = 980 m

speed = 18 km/h = 5 m/s

time to cover the perimeter = perimeter/speed = 980/5 = 196 s = 3 m 16 s