Question

A train travels from city A to city B with an average speed of 60 kmh and returns from city B to city A with an average speed of 75 kmh.
Find the distance between the two two towns if it takes 12 hours to complete the whole journey​

Answer 1

810 kilometers is the distance between the two cities

average speed=total distance/total time

average speed =75+60 kmph=135 km/h

total distance = ?

total time = 12 hours

speed×time=distance

135×12=1620 km

1620 km = two way distance

1620/2 = single way ie. disrance between town a to town b

therefore, disrance between two towns= 810 kms