A soldier fired two bullets at an interval of 335 seconds

A soldier fired two bullets at an interval of 335 seconds moving at a uniform speed v₁. A terrorist who was running ahead of the soldier in the same direction, hears the two shots at an interval of 330 seconds? If the speed of sound is 1188 km/h, then who is the faster and by how much?

1. Soldier, 22 km/h
2. Terrorist, 25 km/h
3. Soldier, 18 km/h
4. Terroist, 20 km/h

Speed of wind (sound) / Relative speed of soldier and terrorist = Time utilised / Difference in time
1188/x = 330/5
x = 18 km/h and solder is faster.