a boy is standing in the middle of a big square field There is a tall building on one side - Science - Sound

Question

a boy is standing in the middle of a big square field There is a
tall building on one side of the field He explodes a cracker and
hears its echo 0 4 second later What is the size of the aqure field
(given = speed of sound in air is 330 m/s)

Parmesh Kaur · Accepted Answer

speed of sound in air = 330m/s
timep period = 0 4s
2*Distance = speed*time
2*d = 330*0 4 = 132
2d = 132
d = 132/2 = 66m
Please specify what you mean by size of the square field
(perimeter or area?)

a boy is standing in the middle of a big square field There is a tall building on one side of the field He explodes a cracker and hears its echo 0 4 second later What is the size of the aqure field (given = speed of sound in air is 330 m/s)