Question

10) We often see a long smoke trail hovering above a moving train. The smoke that comes out
from the engine immediately floats in the air above (which means it is stationary relative to
the air). The smoke takes some time to dissolve and vanish. The time for the smoke to
dissolve depends on the nature of the smoke particles, temperature, humidity of the air, etc.
As the train moves and releases the smoke at different locations we see a smoke trail
extending from the engine to the point where, the smoke dissolves. One day from a
window, you see two identical trains A and B moving with the same speed in opposite
directions crossing each other. You notice that A’s smoke trail is three times as long as B’s.
And that the wind is blowing exactly along the railway line. Find the ratio of the wind speed
to train speed

Answer 1

Answer:

23 : 43 23 is the ratio of wind speed and 43 is the atio of train speed