How often are the hands of a clock at right angle everyday?

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How often are the hands of a clock at right angle everyday?

1. 38 times
2. 44 times
3. 40 times
4. 48 times

Correct Option: B

We know that , In every hour there are two positions in which hands are at right angle.
Each of these positions is repeated 11 times in every 12 hours.
∴ In every 12 hours, hands are at right angles 11 + 11 = 22 times and in a day hands are at right angles 22 + 22 = 44 times.
Hence , required answer will be 44 times.