JEE Main & Advanced
Physics
Wave Mechanics
JEE PYQ-Wave Mechanics
question_answer
An engine approaches a hill with a constant speed. When it is a distance of 0.9 km it blows a whistle whose echo is heard by the driver after 5 seconds. If the speed of sound in air is 330 m/s, then the speed of the engine is: [JEE ONLINE 09-04-2013]