A man stands in front of a hillock and fires a gun. He hears an echo after 1.5s. The distance of the hillock from the man is (velocity of sound in air is `330ms^-1`)

Options

A. 220 m
B. 247.5 m
C. 268.5 m
D. 292.5 m

Answer

B

Explanation

Given t=1.555,`V=330ms^-1`,d=?
time taken by the sound, `t=(2d)/V`
`1.5=(2d)/330`
`d=(330xx1.5)/2`
`:. d=247.5m`