Asked by Dirk

Miles joined the group tour at the sagada in the middle of the cave she hollers loudly. After 1.22 seconds she hears an echo if the air temperature at the cave is 20 degrees Celsius how far away are the cave walls from miles
Answered by oobleck
what is the speed of sound in 20° air? If it is v mi/s, then since distance = speed * time, the distance d to the walls is

2d = 1.22v

2d because her yell makes a round trip to the wall and back
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