The first thing we should do in this casp is subtract both speeds.
We have then:
64.4 km / h - 64 km / h = 0.4 km / h
We must know the following change of units:
1h = 3600 s
1pie = 0.3048m
1km = 1000m
Applying the change of units we have:
0.4 * (1/3600) * (1000) * (1 / 0.3048) = 0.364537766 feet / s
Round to the hundredths
0.36 feet / s
Answer:
a zebra is 0.36 in feet per second faster.
