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A man standing on a terrace hears thunder. The time interval between a lightning flash and the first clap of thunder was found to be $15 seconds$ . The speed of sound in air is $332 m / \sec$ . The distance of the flash from the observer is given by which of the following?

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1568 m

4500 m

4980 m

2345 m

answer is C.

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Detailed Solution

A man standing on a terrace hears thunder. The time interval between a lightning flash and the first clap of thunder was found to be

15 seconds

. The speed of sound in air is

332 m / \sec

. The distance of the flash from the observer is

4980 m .

According to the question, the time interval (

T) = 15 seconds,

The speed of sound in air

(v) = 332 m / \sec,

Then, the distance covered by the sound wave can be calculated from,

Distance = Velocity \times Time

Therefore,

Distance = 332 \times 15

= 4980 m

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