two person walking on a road that diverge at an angle of 120 degree ..if they walk at the rate of 3 and 4km/h respectively .find distance bw them after 4 hours

• after 4 hours they will be at a distance 12km & 16km respectively
  
  if d is distance b/w then
  
  d^2 = 12^2 + 16^2 -2*12*16*cos(120)
  => d^2 = 12^2 + 16^2 + 12*16 = 592
  => d = 16√37 km
  
  
• 9 years agoHelpfull: Yes(0) No(0)