Question

The area of a circular field is 154 m2. Find the time taken by an athlate to complete 2 rounds if she is jogging at the rate of 5 km/hr.

Answer 1

area of field=πr*r=154
=r=7
circumference= 44
so two rounds =88
time=distance/speed
first convert 5*5/18=25/18
so speed = 25/18
time = 88/25/18