passwella.
Menu

JAMB Physics 1985 Question 27

Question 27

Sound

In order to find the depth of the sea, a ship sends out a sound wave and receives an echo after one second. If the velocity of sound in water is 1500 m/s, what is the depth of the sea?

  1. A.0.75 km
  2. B.1.50 km
  3. C.2.20 km
  4. D.3.00 km
  5. E.3.75 km
Show the answer and explanation

Answer: A (0.75 km)

Explanation

The sound takes 0.5 s each way, so depth = 1500 × 0.5 = 750 m = 0.75 km.