A bird keeps flying continuously between two trains, that are following each other on a straight track. The train behind is slower than the one ahead by 1.5 km/h. If the speed of the bird is 20 km/h. what distance would the bird cover in an hour?

Correct option is A

Given:

1. Speed of the bird = 20 km/h
2. The bird keeps flying continuously between the two trains for 1 hour.

The distance covered by the bird is independent of the relative speeds of the trains. Since the bird flies continuously for 1 hour at a constant speed of 20 km/h, the total distance covered by the bird in this time is:

Formula Used:

​$$Distance=Speed×Time$$​​

Calculation: 

$$Distance=20km/h×1hour = 20km$$​

Final Answer:

(a) 20 km