A man riding on bicycle, completes one lap of a circular field along its circumference at the speed of 79.2km/ hr in 2 minutes 40 seconds.what is the area of the field
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21
Given:
speed= 79.2 km/hr = 22 m/s
time= 2 min 40 s = 160 s
dist= speed x time
2 x 22/7 x r = 22 m/s x 160 s
r= 22 x 160 x 7/22 x 1/2
r= 560m [ radius ]
Area: (22/7 * r²)
22/7 * 560 *560 = 985600 m² [ans.]
speed= 79.2 km/hr = 22 m/s
time= 2 min 40 s = 160 s
dist= speed x time
2 x 22/7 x r = 22 m/s x 160 s
r= 22 x 160 x 7/22 x 1/2
r= 560m [ radius ]
Area: (22/7 * r²)
22/7 * 560 *560 = 985600 m² [ans.]
adityavarman:
I'm not sure of the answer. Please check.
kk
Answered by
2
985600 is the correct answer
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