A fan is making 600 revolutions per 𝑚𝑖𝑛𝑢𝑡𝑒. If after some time it makes 1200 revolutions per 𝑚𝑖𝑛𝑢𝑡𝑒, then increase in its angular velocity is a

Question : A fan is making 600 revolutions per 𝑚𝑖𝑛𝑢𝑡𝑒. If after some time it makes 1200 revolutions per 𝑚𝑖𝑛𝑢𝑡𝑒, then increase in its angular velocity is a

(A) 10 𝜋 𝑟𝑎𝑑/𝑠𝑒𝑐

(B) 20 𝜋 𝑟𝑎𝑑/𝑠𝑒𝑐

(C) 40 𝜋 𝑟𝑎𝑑/𝑠𝑒𝑐

(D) 60 𝜋 𝑟𝑎𝑑/𝑠𝑒c

Answer : option (B)

Solution :

A fan is making 600 revolutions per 𝑚𝑖𝑛𝑢𝑡𝑒. If after some time it makes 1200 revolutions per 𝑚𝑖𝑛𝑢𝑡𝑒, then increase in its angular velocity is a
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