Hands of a clock?

The minute and hour hands of the clock meet at 12 o'clock
What is the next time they meet?

3 Answers

62
Lokesh Verma ·

This is probably not a question of algebra, but a question of physics!

How, i will tell..

The angular velocity is the hour hand is 360° in 12 hours. So it is 30° every hour. So it is 0.5° every minute!

The angular velocity of minute hand is 360° in 1 hours. So it is 6° every minute.

Now the relative angular velocity is 6-0.5=5.5° per minute.

The angle that needs to be covered for them to meet again is 360°

Hence, The time for them to meet again is 360/5.5 minutes = 6/5.5 hours = 1.0909 hours = 1 hour and 5.454 minutes
So they will meet at 1:05:60 o'clock

1
Vyom Parashar ·

good question and even better solution. I had seen a solution but that was far more complicated. I like this approach :)

1
Aneesh Gupta ·

nice one!

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