The area of a circular field is 154sq.m. Find the time taken by an athlate to complete 2 rounds if she is jogging at the rate of 5km/hr
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22/7r^2=154
r^2=49
r=7m
Circumference2
2rounds=2circumference=2*44=88m=0.088km
speed=5km/hr
time=Total circumference/speed=0.088/5=0.0176hr
subhavic:
how can we convert 0.0176hr into seconds
1hr=3600sec and 0.0176hr=3600*0.0176=63.36sec
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