AB is a vertical pole with B at the ground level and A at the top. A man finds that the angle of elevation of the point A from a certain point C on the ground is 60°. He moves away from the pole along the line BC to a point D such that CD=7 m. From D the angle of elevation of the point A is 45°. Then the height of the pole is:

Height and Distance: JEE Main 2008 Mathematics question

JEE Main 2008 · Annual, Paper 1 · Q3901

JEE Main 2008Annual, Paper 1MathematicsMediumHeight and Distance38× since 2004

AB

is a vertical pole with

B

at the ground level and

A

at the top.

A

man finds that the angle of elevation of the point

A

from a certain point

C

on the ground is

{60^ \circ }

. He moves away from the pole along the line

BC

to a point

D

such that

CD=7

m. From

D

the angle of elevation of the point

A

{45^ \circ }

. Then the height of the pole is :

JEE Main 2008 Height and Distance Question with Solution (Annual Paper 1, Q3901) | JEE Arc