At what temperatures (in °C) will the speed of sound in the air be 3 times its value at 0°C?

Hint: Use the formula of the velocity of sound. 
Step 1:FindtherelationbetweenvandT.
WeknowthatspeedofsoundinairvT.
vTv0=TT0=T273[whereTisinkelvin]
Step 2:Findthefinaltemperature.
But,vTv0=31[speedbecomesthreetimes]
31=TT0T273=9
T=273×9=2457K=2457-273=2184°C