Physics - Sound Wave Question with Solution | TestHub

A$25 \mathrm{cm}$long string is fixed at both ends. It has a mass of$2.5 \mathrm{g}$and vibrates in its first overtone under tension. Also given is a closed pipe which is$30 \mathrm{cm}$long which vibrates in its fundamental frequency. When both of these are sounded simultaneously,$8$beats per second are heard. It is also observed that decreasing the tension in the string also decreases the beat frequency. What is the tension (in$\mathrm{N}$) in the string? [Given, speed of sound in air is$360 {\mathrm{ms}}^{-1}$]