Question

An explosion occurs 34 km away. The time it takes for its sound to reach your ears, traveling at 343 m/s, is

Answer 1

Answer: 99.1 seconds

Explanation: You know that the total distance is 34km, and the speed of the sound is 343m/s.

Now, the total time that takes to something with a given velocity, to reach a distance D, is:

T = D/v

where D = 34km and v = 343m/s

Now, here we have different units, so we must convert the kilomeres into meters, this can be done as: 1km = 1000m then, 34km = 1000*34m = 34000m

Then the total time is:

T = 34000m/343m/s = 99.1 seconds

Answer 2

Answer:

99 s

Explanation:

distance = rate × time

34000 m = (343 m/s) t

t = 99 s