Question

A train travels from city a to city b and then to city


c. the distance from a to b is 225 miles and the distance from b to c is 227.5 miles. the average speed from a to b was 50 miles per hour, and the average speed from b to c was 65 mph. what was the average speed from a to c (that is for the entire trip) in miles per hour?

Answer 1

total time =(225/50 + 227.5/65) = 8 hours
total distance= 225+227.5=452.5 miles
therefore average speed=452.5/8=56.5625 miles per hour