# 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

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are you sure the area is in metre? because the time is coming in decimal.

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are you sure the area is in metre? because the time is coming in decimal.

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πr² = 154

r² = 154 x 7/22

= 49

r = √49 = 7

Circumference = 2πr

= 2 × 22/7 × 7

= 44 m

Area to jog = 2(2πr)

= 2 (44) m = 88m = 0.088 km

Speed = 5 km/h

time = 88/1000 ÷ 5

= 21.12

The Brainliest Answer!

Area=πr^2

154=22/7r^2

154×7/22=r^2

r^2=49

r=√49

r=7

Perimeter=2πr

=2×22/7×7

=44m

Distance for covering one round=44m

Distance for covering two rounds=44×2

=88m

Speed=5km/hr

=5×1000/60×60

=25/18 m/s

speed=distance/time

=88×18/25

=63.36 seconds

hope it was helpful

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