pl answer this question-
A girl is sitting in a park 12 m wide and 12 m long.ON the left hand side of the park is a building adjoining the park.On the right hand side of the park is a road adjoining the park.A person lights a cracker on the road.Will the echo be heard by the girl?Why/Why not??
No. because there is no object to reflect the sound ( like building mountain etc) .