Question

Calculate time period of a body if it convers 40 oscillation in 20 seconds

Answer 1

time period is nothing but time taken to complete one oscillation .

so, If body covers 40 oscillation in 20 seconds we have to calculate how much time will it take to complete one oscillation.

so 40 is equal to 20 and 1 is equal to x.
by cross multiplying - we get

Answer 2

given that,
no. of oscillations=40
total time taken=20 seconds

time period=total time /total no. of oscillations

40÷20=20seconds