A boy hears an echo of his own voice from a distant hill after 2 seconds. The speed of sound in air is 350 m/s. The distance of the hill from the boy is |
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(a) |
175 m |
(b) |
200 m |
(c) |
350 m |
(d) |
|
A boy hears an echo of his own voice from a distant hill after 2 seconds. The speed of sound in air is 350 m/s. The distance of the hill from the boy is |
|||||||
(a) |
175 m |
(b) |
200 m |
(c) |
350 m |
(d) |
|