Answers

2016-03-29T19:08:49+05:30
Area = 154m² = pi×r² = 22r²/7
r = 7m
circumference = 2×pi×r = 2×22×7÷7 = 44m
1 round ⇒ 44m
2 rounds ⇒ 88m
5000m  ⇒ 1hr
88m ⇒ x
x = 88/5000 hr = 63.36 s ≈1min 4s
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