# The speed of sound in air at N.T.P is 332 m/s. If air pressure becomes four times :

The speed of sound in air at N.T.P is 332 m/s. If air pressure becomes four times, then the speed of sound will be

(a) 166 m/s

(b) 332 m/s

(c) 664 m/s

(d) 1328 m/s