A train travels at a speed of 30 miles per hour. If 1 mile = 1.6 kilometers, how fast is the train traveling in kilometers per minute?

A - 1.0 km/min

B - 0.4 km/min

C - 0.8 km/min

D - 0.6 km/min

The answer

the speed of the train traveling in kilometers per minute can be found by using the following method:

v = 30 miles per hour

1 mile = 1.6 kilometers

just do the calculus by changing miles to kilometers

1 mile = 1.6 kilometers, so 30 miles = 1.6 km x 30 = 48 km

so the speed of the train is

v=30 miles / hour = 48km / h = 48km / 60 mn = 0.8 km / mn

the answer is

C - 0.8 km/min