Multiple Choice Questions on The time elapsed between viewing a lightning flash and hearing the thunder of a cloud is 10 s If the........... for CAPF (AC) Exam Preparation

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Multiple Choice Questions

The time elapsed between viewing a lightning flash and hearing the thunder of a cloud is 10 s If the...........

Quantitative Aptitude( Paper-I ) Time & distance
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    The time elapsed between viewing a lightning flash and hearing the thunder of a cloud is 10 s. If the speeds of sound and light in air are 330 m/s and 3 x 108 m/ s respectively, how far away is the storm?
    This questions was previously asked in
    CAPF 2021 Paper-1
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    About 1650 m

    Incorrect Answer

    About 3300 m

    Correct Answer

    About 990 m

    Incorrect Answer

    About 1000 m

    Incorrect Answer
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    Explanation:

    About 3300 m.

    • Time elapsed between viewing a lightning flash and hearing the thunder,
    • t = 10 sec
    • speeds of sound in air = 330 m/s
    • Speed of light = 3 × 108 m/s
    • Distance of storm = speed of sound in air × Time = 330 × 10= 3300 m
    • The storm is 3300 m far .

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