An engine approaches the hill with a constant speed. When it is at a distance of 0.9 km, it blows a whistle whose echo is heard after 5 seconds. What is the speed of engine. Speed of sound is 340 m/s.
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Speed=Distance/Time=900/5m/s
=180m/s.ans......
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=180m/s.ans......
Hope this will help you.
Please mark it as brainliest.
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