Manuel can drive 3 times as fast as Raul can ride his bicycle. If it takes Raul 3 hours longer than Manuel to travel 36 miles, how fast can Raul ride his bicycle

Question

this is my last question on homework not sure how to do it

Answer 1

36 = r*(t-3) = rt - 3r

36 = (r/3)*(t) = (1/3)(rt)

108 = rt

36 = 108 - 3r

-72 = -3r

r = 24

driving: 24 mph x 1.5 hours = 36 miles

bike: 8 mph x 4.5 hours = 36 miles