A

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Q. How many times are the hour hand and the minute hand of a clock at right angles during their motion from 1.00 p.m. to 10.00 p.m.?

  • (A) 9
  • (B) 10
  • (C) 18
  • (D) 20
  • Correct Answer - Option(C)
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  • Filed under category Reasoning
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Explanation by: Admin
The duration from 1.00 p.m. to 10.00 p.m. is 9 hours and during each of these 9 hours the hands of a clock are at right angles twice.

So, required number = 9 × 2 = 18.

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