Question

Two trains ,each having a speed of 30km/h,are headed at each other on the same track .A bird flies off one train to another with constant speed of 60km/h when they are 60km apart till before they crash . Find the distance covered by the bird and how many trips the bird can make from one train to other before they crash​

Answer 1

Explanation:

From the situation,

Recognizing that the gap between the trains is closing at a constant rate of 60 km/h ,the total time that elapses before they crash is t=(60km)/(60km/h)=1.0h.

During this time, the bird travels a distance of

x=vt=(60km/h)(1.0h)=60km.