Question

a narra tree costs a shadow of 28m long if its height is 40m how long is the shadow of another tree which is 60m at the particular time​

Answer 1

Answer:

In △ABD,

tan60o=BDAB

3=xh

∴   x=3h                ------- ( 1 )

Now in △ABC,

tan30o=BCAB

⇒  31=x+40h

⇒  x+40=3h

∴  3h+40=3h          [  From equation ( 1 ) ]

⇒  h+403=3h

⇒  2h=403

∴  h=203m

∴  The height of a tower is 20root3m.