When a ceiling fan is switched off its angular velocity reduces to 50% while

When a ceiling fan is switched off its angular velocity reduces to 50% while it makes 36 rotations. How many more rotation will it make before coming to rest?(assume uniform angular retardation)

Options

(a) 18
(b) 12
(c) 36
(d) 48

Correct Answer:

12

Explanation:

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