Two aeroplanes are approaching eachother and their velocities are 100 and 240 km `//` h .
Channel: Doubtnut
Date: 02/08/2020

Two aeroplanes are approaching eachother and their velocities are 100 and 240 km `//` h . The frequency of a note emitted by the first as heard by the passengers in the other is 100. Calculate the true frequency of the note as head by its own passengers. Take the velocity of sound as `1200km.//hr.`