BPSC – Combined Competitive Examination · প্রশ্ন 23
How many times do the hands of a clock coincide in a day?
উত্তর দেখান ও ব্যাখ্যা
উত্তর: (D) 22
ব্যাখ্যা
The minute hand gains 360° on the hour hand every 12/11 hours, so they meet 11 times per 12 hours.
- (A) ভুল
Wrong: they coincide 11 times every 12 hours, so 22 in a day.
- (B) ভুল
Wrong: that is roughly per 12 hours, and even then it is 11.
- (C) ভুল
Wrong: the 11–1 o'clock coincidence is shared, so it is 22.
- (D) সঠিক
Correct: the hands meet 11 times in 12 hours, i.e. 22 times in 24 hours.