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A thunder clap is heard $5.5 seconds$ after a lightning flash. The distance of the flash is (velocity of sound in air $= 330 m / s$ ).

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1750 m

1815 m

3000 m

3500 m

answer is B.

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Detailed Solution

The distance of the flash is

1815 m

.
Given,
Speed of sound in air,

v = 330 m / s

Time taken,

t = 5.5 \sec

By using the formula of speed,

Speed = \frac{distance}{time}

It can also written as

v = \frac{s}{t}

On substituting the values, we get

\Rightarrow 330 = \frac{s}{5.5}

\Rightarrow s = 1815 m

Hence, the distance of the flash is

1815 m

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