What is the area of a triangular prism with a base of 10 meters, height of 5 meters, and length of 15 meters?
A - 250 meters^2
B - 500 meters^2
C - 750 meters^2
D - 1000 meters^2
A - 250 meters^2
B - 500 meters^2
C - 750 meters^2
D - 1000 meters^2