42. The formula S = 20 Vt +273 gives the speed of sound S in meters per second near Earth's
surface, where t is the surface temperature in
degrees Celsius. At a point near Earth's surface,
if the speed of sound is 348 meters/second,
what is the corresponding temperature in
degrees Celsius to the nearest degree?
F. 3
G. 30
H. 100
J. 200
K. 300