Rakesh drew and measured the angle made when the clock ticks at 9'O' clock. If his answer was right, what was his answer?
A
60∘
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B
40∘
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C
90∘
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D
180∘
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Solution
The correct option is C90∘
An analogue clock is divided up into 12 sectors, based on the numbers 1–12. One sector represents 30 degrees. The angle formed by the hour - hand at 9 and minute - hand at 12 i.e. 9'O' clock is 90∘, a right angle.