Q.3. Rohit made 12 rounds of a circular ground. He
had to walk a total distance of 5.28 km. Find the
radius of the ground.
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Answer:
total rounds made = 12
total distance covered = 5.28 km
distance of one round = 5.28 / 12
= 0 .44
circumference = 0.44 km
2πr = 0.44
2 * 22/7 * r = 0.44
r = 0.44 * 7/22 * 1/2
r = 0.07 km
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