Solve the Problem $75 \mathrm { ft }$ B) $270 \mathrm { ft }$

Multiple Choice

Solve the problem.
-A motorcycle daredevil is planning a stunt to perform at a county fair. A ramp must be built to give him a 20% grade, or slope. If the vertical height at the end of the ramp must be 15 ft to assure that
The stunt is a success, what must be the length of the horizontal run?

A) $75 \mathrm { ft }$
B) $270 \mathrm { ft }$
C) $2.7 \mathrm { ft }$
D) $15 \mathrm { ft }$