AAI ATC Junior Executive 26 Dec 2015 Shift 1 Paper

An earthquake generates both transverse (S) and longitudinal (P) waves in earth. The speed of S waves is about 4.5 kms^-1 and that of P wave 8.0 kms^-1. A seismograph records P and S waves from an earthquake. The first P wave arrives 4.0 min before the first S wave. The epicentre is located at a distance of about: