UPSC CAPF AC 2021 Paper

Question : 1 of 125

Marks: +1, -0

Paper I - General Studies

The time elapsed between viewing a lightning flash and hearing the thunder of a cloud in 10s. If the speeds of sound and light in air are 330m∕s and 3×108m∕s respectively, how far away is the storm?

About 1650 m
About 3300 m
About 990 m
About 1000 m

Validate

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