Question

(b) a person fires a gun in front of a building 167m away. if the speed of sound is 334 ms-1 calculate the time to her to hear an echo?

Answer 1

$\mathfrak{ \huge{ \red{ \underline{ \underline{ANSWER}}}}}$

• Given :

=> distance between person and building (d) = 167m

=> Velocity of sound (v) = 334 m/s

• To Find :

=> total time requires to hear an echo (t)

• Formula :

$\: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \boxed {\sf{ \bold{ \pink{v = \frac{d}{t}}}}}$

• Calculation :

$\sf \implies \: total \: distance \: covered \: by \: sound \: wave = 2 \times 167 = 334m \\ \\ \sf \implies \: t = \frac{d}{v} = \frac{334}{334} = 1 \: s \\ \\ \\ \boxed{\boxed{ \green{ \bold{ \huge{ \star}}}}} \: \: \boxed{ \boxed{ \bold{ \blue{\sf{ \huge{time = 1 \: s}}}}}} \: \: \boxed{ \boxed{ \bold{ \green{ \huge{ \star}}}}}$