The speed of sound can be measured using the apparatus shown in Figure $\mathrm{P} 11.58$. A 440-Hz tuning fork vibrating above a tube partially filled with water initiates sound waves in the tube. The standing sound waves are formed inside the tube when the water in the tube is lowered $0.20 \mathrm{m}$ and $0.60 \mathrm{m}$ from the top of the tube. Use this information to determine the speed of sound in air.