Answers

  • ATC
  • Ambitious
2015-03-15T21:32:38+05:30
When an observer looks down the plane the angle of depression of two banks of a river is 60 and 45

Tan 60= root3/1=300/x
x root 3=300
x=300 / root3
x=300 root3/3 -------------RATIONALISING---------------(1)
tan 45=1/1=300/ D
300=D-----------------------------------------------(2)

width= x+D =>300+300 root3/3
taking LCM
900+300 root 3 all divided by 3 and this is the width of the river

please NOTE: couldnt find any symbols associated with roots so it is written in words
hope it 'll be help


 
0