AP EAMCET Engineering 2013 Solved Paper

A source of sound of frequency 640Hz is moving at a velocity of

100

3

m∕s along a road, and is at an instant 30m away from a point A on the road (as shown in figure). A person standing at O,40m away from the road hears sound of apparent frequency v′. The value of v′ is (velocity of sound =340m∕s )