A train travels 42 kilometers in 15 minutes. How far will the train travel in 3 hours at that speed?

A.

168 km

B.

336 km

C.

504 km

D.

672 km

To answer the problem above, we first find the velocity of the train that is travelling. It is calculated as follows:

Velocity = 42 km / 15 min = 2.8 km / min

The distance traveled after 3 hours at this speed is calculated by multiplying the velocity and the number of hours.

Distance = 2.8 km / min (3 hours) (60 min / 1 hour) = 504 km