Question

If a clock strikes
at lo clock twice at
20 clock, and so how many times will strike in
a day?​

Answer 1

Step-by-step explanation:

Do you know in a day there are 24 hours?but a clock made for 12 hours.

means we have to multiply to times two sum of strikes upto 12 hours.so clock strikes serially 1 ,2 ,3, 4,.....12 here what you observed?all are in AP because common difference always 1now use sum of n natural numbers = n(n+1)/2Here n=12therefore, clock strikes in 12 hours = 12(12+1)/2 = 72 therefore,clocks strikes in one day= 2×78 = 156