Two wires are fixed in a sanometer. Their tension are in the ratio `8:1` The lengths are in the ratio `36:35` The diameter are in the ratio `4:1` Densities of the materials are in the ratio `1:2` if the lower frequency in the setting is `360Hz`. The beat frequency when the two wires are sounded together is

Options

A. `20Hz`
B. `10Hz`
C. `30Hz`
D. `40Hz`

Answer

B

Explanation

`(n_(1))/(n_(2))=(l_(2))/(l_(1))sqrt((T_(1))/(T_(2)).(mu_(2))/(mu_(1)))`