A girl stand 80m away from a tall cliff and blows a whistle. If the speed of sound in air is 330ms-1, how long would it take for her to hear the echo of the sound?
Take Free Practice Test On 2026 JAMB UTME, Post UTME, WAEC SSCE, GCE, NECO SSCE
Correct Answer: Option C
Explanation:
t = \(\frac{2x}{v} = \frac{2 \times 80}{330} = 0.485s\)
t = \(\frac{2x}{v} = \frac{2 \times 80}{330} = 0.485s\)