Question

In dry air at a temperature of 68 F, sound travels at the speed of 767 mph or 1125 ft/sec. How many seconds does it take sound to travel 1 miles (5280 ft) in air?

Answer 1

The answer is 4.69 sec

Explanation:

We know time taken = distance / speed

here 1 mile = 5280 feet , so 767 mph = 767x 5280 feet /( 60x60 ) s = 1124.93 feet / sec .

now , time taken
`Time = (5280)/(1124.933)= 4.69 sec`

It will take 4.69 sec for the sound to travel 1 mile or 5280 feet .