Step-by-step explanation:
The speed of sound is given to be 340 m/s.
The first thunder is heard 2.53 seconds after the lightning, so the distance traveled by the sound is:
d = v × t
d = 340 m/s × 2.53 s
d = 860.2 m
The second thunder is heard 22.94 seconds after the lightning, so the distance traveled by the sound is:
d = v × t
d = 340 m/s × 22.94 s
d = 7799.6 m
The distance traveled by the storm is therefore:
Δd = 7799.6 m − 860.2 m
Δd = 6939.4 m
The speed of the storm is therefore:
v = d / t
v = 6939.4 m / 131.28 s
v = 52.86 m/s
Convert to km/hr:
v = 52.86 m/s × (1 km / 1000 m) × (3600 s / hr)
v = 190.29 km/hr