Question

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

Answer 1

area of a circle =πr²
πr²=154m²
r=7m
circumference of a circle =2πr
2*22/7*7=44m
2 rounds will be 2*44=88m
speed =distance/time
time=distance/speed
time=63.36 Second