Question

A pendulum A oscillates 16 times in 4 seconds and pendulum B oscillates 40 times in 8 seconds. The number of oscillation completed by pendulum A in the time equal to the time taken by pendulum B to complete 100 oscillations

Answer 1

Answer:

Answer is 80 oscillations

Explanation:

oscillation rate of pendulum A

$\frac{16}{4} = 4 \: oscillations \: per \: sec$

oscillation rate of pendulum B

$\frac{40}{8} = 5 \: osci \: per \: sec$

time taken by B in 100 oscillations

$\frac{100}{5} = 20 \: sec$

number of oscillation done by A in 20 sec

$20 \times 4 = 80 \: oscillations$

Answer 2

Answer:

Answer is 80 oscillations

Explanation:

oscillation rate of pendulum A

oscillation rate of pendulum B

time taken by B in 100 oscillations

number of oscillation done by A in 20 sec