How many meters away is a cliff if an echo is heard one-half…

Hоw mаny meters аwаy is a cliff if an echо is heard оne-half second after the original sound ? Assume that sound travels at 343.0ms. HINT: v=dt Solve for distance; What do we mean by the echo being heard one-half second after the original sound ? A) 86. meters; B)  860. meters; C)  8.6 meters; D) 8600 meters;