The speed of sound is approximately 1.2 × 103 km/h. How long does it take for sound to travel 7.2 × 102 km? Write your answer in minutes
time = distance/speed, so
7.2*10^2 km / 1.02*10^3 km/hr = 7.06 * 10^-1 = 0.7 hr = 42 minutes
7.2*10^2 km / 1.02*10^3 km/hr = 7.06 * 10^-1 = 0.7 hr = 42 minutes