Question

A train covers the first 85km of its journey at 51km/hr,the next 125 km at 75km/hr and the last 90km at 135km/hr. Find a) The total time it takes to complete the journey b) It's average speed for the whole journey​

Answer 1

Answer:

The train covers total distance in three legs , first 150 km. In 3 hours , next 125 km in 2 hours and last 180 km in 3 hours 30 minutes

We know Average speed = total distance / total time

Total distance in three legs = 150 + 125 + 180 kns = 455 kms.

Total time = 3 hours + 2 hours + 3 hours 30 minutes = 8 hours 30 minutes = 8.5 hours

Average Speed = 455 km / 8.5 hours

Average Speed = 53.53 km/hour

The average speed of the train is 53.53 km/hr.

Answer :The average speed of the train is 53.53 km/hr.

Step-by-step explanation:

Mark as brainliest