SOLUTION: A bus​ averages 4 miles per hour faster than a trolley. If the bus travels 170 miles in the same time it takes the trolley​ to travel 150 miles, then what is the speed
The problem literally says that
= ,
where t is the speed of the trolley
170*t = 150*(t+4)
170t = 150t + 600
20t = 600
t = 600/20 = 30 miles per hour is the trolley speed ANSWER
and 30+4 = 34 mph is the bus speed. Answer