Question

At sea level, the speed of sound is 3.40×10² meters per second. After 3 hours and 30 minutes, about how many kilometers could a sound wave travel? A. 4.28 x 10³ km B. 7.14x10³ km C. 7.14 x 10⁴ km D. 6.73x 10⁴ km E. 4.28x10⁵ km

Answer 1

speed = 3.4 x 10^2 m/s

t = 3h 30 min

Equation

speed = distance / time

Convert time to seconds

1 h ----------------------3600 s

3 h ---------------------- x

x = (3 x 3600)/1

x = 10800 s

1 min --------------- 60 s

30 min -------------- x

x = 1800 s

Total time = 10800 + 1800

= 12600 s

distance = speed x time

distance = 3.4 x 10^2 x 12600

= 4.28 x 10^6 meters

= 4.28 x 10^3 Km