Question

The area of a square field is 60025 meter square. A boy is cycling along its boundary at 18 km/hr. In how much time will he return to the starting point?

Answer 1

Area = a²
so a=√area
= √60025
=. 245 m
Perimeter = 4a
=4×245
=980 m
Speed of cycle = 18 km/hr
= 18×(5/18) m/s
= 5m/s

{Km/hr =(5/18) m/s }
t=distance÷speed
= 980÷5
= 196 s