Question

A child watching Dussehra from a distance sees the effigy of ravana burst into flames and hears the explosion associated with it 2 sec after that. How far was he from the effigy if the speed of sound in air that night was 335m/sec​

Answer 1

Time taken for the boy to hear the explosion (t) = 2 sec

Speed of sound in air (v) = 335 m/sec

∴ Distance at which the boy was standing and heard the sound =

=> S = v × t [Basic formula]

=> S = 335 × 2

=> S = 670 m

_____________

$\star$Hence, shown.

Answer 2

SPEED = DISTANCE/TIME

335*2

=670 metere

the child is 670 metere