Solved papers for JEE Main & Advanced JEE Main Solved Paper-2015
done JEE Main Solved Paper-2015 Total Questions - 1
question_answer1) A train is moving on a straight track with speed \[20m{{s}^{-1}}.\]. It is blowing its whistle at the frequency of 1000 Hz. The percentage change in the frequency heard by a person standing near the track as the train passes him is (speed of sound \[=320m{{s}^{-1}}\] ) close to
[JEE Main Solved Paper-2015 ]