Question

Please someone help
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Answer 1

1st Answer

1 revolution=1min =distance :2πr

Speed=8.91 km/hour

∴D=s×t=8.91×1000×1m

=8910m

∴ In 60min, distance=8910m

∴ In 1min, distance= 8910/60 =148.5m

∴2πr=148.5

∴r= 148.5/2×3.14

∴D=2×r=2× 148.5/2×3.14

D=47.2m.

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