Question

An explosion occurs 340 km away. Given that sound travels at 340 m/s, the time the sound takes to reach you is
a. 1 s.
b. 10 s.
c. 100 s.
d. 200 s.
e. more than 200 s.

Answer 1

first convert 340km into 340,000m, and 340000/340=1000. So the answer is e.

Answer 2

(340,000 meters) / (340 meters/sec)  =  1,000 seconds

That's more than 200 sec.