`15/x+90/(x+30)=2`
The equation above represents the following situation. On his way home from college , Juan traveled 15 miles on local roads and 90 miles on the highway. On the highway he traveled 30 miles per hour faster than on local roads . The whole trip took 2 hours. Which of the following describes what the expression `90/(x+30)` represents in the equation ?

Options

A. The time , in hours ,that Juan drove on local roads
B. The time , in hours , that Juan drove on the highway
C. Juan's rate of speed , in miles per hour, on local roads
D. Juan's rate of speed , in miles per hour, on the highway

Answer

B