Question

A boy standing between two hills claps his hand and hears echoes after 5 second and 14 second. If the speed of
sound in air is 320ms . Then
16. The distance of the closer hill is
(A) 1600 m
(B) 2240 m
(C) 600 m
(D) 800 m
17. The distance of the farther hill is
(A) 1600 m
(B) 1120 m
(C) 2240 m
(D) 800 m
18. The distance between the two hills is
(A) 2720 m
(B) 2400 m
(C) 3040 m
(D) 3660 m​

Answer 1

Answer:

[16]A.1600

[17]

Explanation:

16. what is distance ?

 = distance =speed * time

 = d = 320*5 = 1600 m

17.The distance of the farther hill

 = distance =speed * time

 = d = 320 *14 = 5000 m

18. The distance between the two hills is

 = d2-d1

 = 5000-1600

 = 3400m