WBCS.LIVE practice question

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 3×10⁸ m/s respectively, how far away is the storm?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. About 1650 m
  2. About 3300 m
  3. About 990 m
  4. About 1000 m

Correct answer and explanation

Correct answer: About 3300 m