Question

if a metal rod vibrates 2280 times in 15 sec.Find
its frequency.​

Answer 1

Frequency of vibration is defined as number of vibration per second, so,

$\sf Frequency,f = No.\:of\: vibrations/Time\:in\: seconds$

$\sf\implies 2280/15$

$\sf\implies 152Hz$

Answer 2

⠀⠀⠀⠀⠀⠀FREQUENCY

⠀⠀⠀⠀⠀⠀$→ \tt\frac{No.\ of\ vibrations}{Time\ in\ seconds} \\ \\ → \frac{2280}{15} \\ \\ → \rm \boxed{ 152 \: \tt \: Hz}$