Question

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

Answer 1

so in that 750 seconds he travels 330.30 so speed
$330 \times 30 \div 750$
13.2 m/s