Light travels at a speed of 3.00*10^10 cm/s. What is the speed of light in kilometers/hour?

The speed of
light in cm/s is `3.00*10^10` cm/s.

1 km = `10^5` cm and 1 h = 3600
s

In the units km/h, `3.00*10^10` cm/s = `3.00*10^10*(3600/10^5)` =
`10800*10^5` = `1.08*10^9` km/h

In the units km/h, `3*10^10`
cm/s is `1.08*10^9` km/h