railway DFCCIL Junior Executive 2023 (CBT 1 & CBT 2) Mock Test Physics Waves Traveling Sound Waves

If a man shouts loudly close to a high flat hill surface at a distance of 100 m from man, how long after the shout will the echo be heard? (speed of sound in air = 330 m/s)

1

6 sec

2

6 min

3

0.6 sec

4

0.6 min

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