1.The sound from a bolt of lighting travelled 4.08km in 12.0s. whats was the spped of the sound in metres per second?

0.340m/s
49.0m/s
340m/s
343m/s

2.A vehicle is travelling 1.0x10^2 km/h. what is the spped of the vehicle in metres per second?
28m/s
27.8m/s
3.6x10^2m/s
1.0x10^4m/s

2 answers

1.
4.08 km/12 s x (1000 m/1 km) = ? m/s
0.340