the area of a circular field is 154 m square find the time taken by an athlete to complete 2 rounds if she is talking at the rate of 5 km per hour
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area = πr²
154 = 22r²/7
7 = r²/7
r² = 49
r = 7 m
circumference = 2πr
= 2*22*7/7
= 44 m
so 2 rounds = 88 m
speed = distance/time
5000 = 88/t
t = 0.0176 hours
154 = 22r²/7
7 = r²/7
r² = 49
r = 7 m
circumference = 2πr
= 2*22*7/7
= 44 m
so 2 rounds = 88 m
speed = distance/time
5000 = 88/t
t = 0.0176 hours
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