Q:

Two guns were fired from the same place at an interval of 13 minutes but a person in a train approaching the place hears the second shot 12 minutes 30 seconds after the first. Find the speed of train if sound travels at 330 metres per second.

• 1
  $$ {46{13\over 25}}km/hour$$
• 2
  $$ {47{13\over 25}}km/hour$$
• 3
  48 km/hour
• 4
  49.2 km/hour