Question

2.
A submarine, 608m below sea level, sends a SONAR signal to detect an aircraft directly above it.
If it receives the signal 10 sec. later, how far is the aircraft from the submarine?
(Speed of sound in air = 340 m/s, Speed of sound in seawater = 1520 m/s)
(a) 2172m
(b) 2092m
(C) 1754m
(d) 1600m​

Answer 1

Hii Dear,

● Answer -

Distance of aircraft from submarine = 2172 m

● Explaination -

Given that signal returns to submarine after 10 s, time taken for signal to travel from submarine to aircraft will be 10/2 = 5 s.

Let x be the distance be distance of aircraft from submarine.

t = s1/v1 + s1/v2

5 = 608/1520 + (x-608)/340

5 = 0.4 + (x-608)/340

x-608 = (5-0.4) × 340

x = 608 + 1564

x = 2172 m

Hence, distance of aircraft from submarine is 2172 m.

Hope this helps you..