Question

what is the temp at which velocity of sound in air will be 1.5 times its velocity at 0°?

Answer 1

hey mate here is your answer .....
velocity of sound = sproot (gama*R*T)
where ,
gama is 1.4 for air
R is 287
T in Kelvin
so at 7 celsius velocity of sound is 335.41 m/s and as u need 1.5 times speed so it will be 503.11 m/s so by above equation you get T as 629.96K and 356.96 celsius

so your answer is 356.96 celsius

I hope it may help u