"An  aeroplane leaves an airport and flies due north at a speed of 1000km/hr. At  the same time,
Channel: Doubtnut
Date: 05/07/2020

"An
  aeroplane leaves an airport and flies due north at a speed of 1000km/hr. At
  the same time, another aeroplane leaves the same airport and flies due west
  at a speed of 1200km/hr. How far apart will be the two planes after `1 1/2`
hours?"