If air temperature increases, what happens to sound speed and the minimum distance needed to hear a distinct echo?

Question

If air temperature increases, what happens to sound speed and the minimum distance needed to hear a distinct echo? — Exam MCQ

rrbjepyq.in · Accepted Answer

C. Both increase — Sound travels faster in warmer air. For the same minimum echo delay, d = vt/2 also increases.

rrbjepyq.in · Answer

A. Speed decreases and distance increases

rrbjepyq.in · Answer

B. Speed increases and distance decreases

rrbjepyq.in · Answer

D. Both decrease