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A car moves on a circular path of radius 10 metre. It complete 5 revolution in 5 minute. What is its average speed?
A .  10 π m / minute
B .  20 π m / minute
C .  30 π m / minute
D .  5 π m / minute
Answer: Option B
The linear speed is,
v = r ω ;ω = θt
Substituting, we get,
v=20 π m / minute

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