MCQOPTIONS
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| 1. |
A boy receives his echo in 6 seconds. Find the distance of the reflecting surface from the boy. (The speed of sound in air = 342 m/s) |
| A. | 28.5 m |
| B. | 1026 m |
| C. | 67 m |
| D. | 2052 m |
| Answer» C. 67 m | |