Answers

2014-03-02T16:49:31+05:30
80 m, as the height of the lighthouse will come to  140 m

0
2014-03-02T16:53:17+05:30
Let distance between pole and light house be Y,
tan60=60/Y    Y=20root3
tan 30= 60-x/y  (x is h of light house)
60-x=20
therefore x = 40 
therefore difference of heights is 20 m

0