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An unknown frequency x produces 8 beats ...

An unknown frequency `x` produces 8 beats per seconds with a freuquency of `250` Hz and 12 beats with `270Hz`. Source then `x` is

A

`258Hz`

B

`242Hz`

C

`262Hz`

D

`282Hz`

Text Solution

Verified by Experts

The correct Answer is:
A
`n_(1)=250Hz`, `Deltan_(1)=8`
`n_(2)=270Hz`, `Deltan_(2)=12`, `n_(x)=?`
This is possible when `n_(1) lt n_(x) lt n_(L)`
`impliesn_(x)-n_(1)=Deltan_(1)`
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