मराठी

A boy stands 83 m in front of a high wall and then blows a whistle. Calculate the time interval when hears an echo. Speed of sound is 332 ms−1.

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प्रश्न

A boy stands 83 m in front of a high wall and then blows a whistle. Calculate the time interval when hears an echo. Speed of sound is 332 ms−1.

संख्यात्मक
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उत्तर

Distance between wall and boy (d) = 83 m

Speed of sound (v) = 332 ms−1

\[ \text{Time } (\mathrm{t}) = \frac{2d}{v}\]

\[= \frac{2 \times 83}{332} \]

= 0.5 s

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पाठ 6: Sound - NUMERICAL PROBLEMS ON ECHOES [पृष्ठ १२५]

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गोयल ब्रदर्स प्रकाशन A New Approach to ICSE Physics [English] Class 10
पाठ 6 Sound
NUMERICAL PROBLEMS ON ECHOES | Q 1. | पृष्ठ १२५
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