Question

plzz give the answer​

Answer 1

Answer:

Let AB be the house of 11m

CD be the lamp post

|_ACX= 30°

|_ADB=60°

in ∆ABD,

tan60°=AB/BD=√3

=11/BD=√3

=11/√3=BD

=11√3/3=BD

in ∆ACX,

tan30°=AX/CX=1/√3

=AX/11√3/3=1/√3. (as CX=BD)

=AX=1/√3 X 11√3/3.

=AX=11/3 cm

CD= AB - AX

= 11- 11/3

=33/3 - 11/3

=22/3

= 7.34cm

hope you understand the answer.

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