Question

how many time does an hour hand in 12hour clock rotate a day ​

Answer 1

Solution:

Know that, the periphery of the dial in the clock is numbered 1 through 12 indicating the hours in a 12-hour cycle.

Therefore, a short hour hand makes two revolutions in a day.

Answer 2

Given,

The clock is a 12 hour clock.

To find,

The number of times that the hour hand of the clock rotates in a day.

Solution,

We can simply solve this mathematical problem by using the following mathematical process.

As, it is a 12 hour clock,.

time elapsed during the 1 complete rotation by the hour hand = 12 hours

(Let us assume, that the hour hand starts its journey from the marking of 12. So, the time taken by the hour hand to reach the marking of 12 again, will be the time elapsed during one complete rotation of the hour hand. Now, marking of 12 to marking of 1 = 1 hour, marking of 12 to marking of 2 = 2 hours .... marking of 12 to next arrival of marking of 12 = 12 hours.)

Now,

1 complete day = 24 hours

Thus,

Number of complete rotations by the hour hand in a day = Number of hours in a day / Time elapsed during one complete rotation of hour hand = 24/12 = 2

Hence, an hour hand rotates 2 times in a day.