Question

On a 100km track , a train travels the first 30km with a speed of 30km/h . How fast the train travel the next 70 km if the average speed for the entire journey is 40km/h?

Answer 1

Answer:

The displacement of an object is the product of speed and time. The time taken to travel 30 km (D1) is 30 km/hr. The average speed to travel the whole 100 km is average 40km/hr.

Explanation: