Work problems for algebra

Question

A car can travel 120 miles in the same time that it takes a bus to travel 80 miles. If the rate of the bus is 20 mph slower than the car, fun average rate for each

Answer 1

car goes 120 miles in same time bus goes 80 miles

bus is 20 mph slower, what's average rate of speed for each??

d=rt

t = d/r = 120/c = 80/b = 80/(c-20)

12/c = 8/(c-20)

12c - 240 = 8c

4c = 240

c = 60 mph = car speed

b = 40 mph = bus speed