Math, asked by shyamphad666, 10 months ago

In angle of elevation of a cloud from a point 60m above lake is 30° and angle of depression of the reflection of a cloud in the lake is 60°.find the height of the cloud from the surface of lake?

Answers

Answered by shanaya5673
17

Answer:

hey dear here is your answer

hope it helps you

mark my answer brainlist

Attachments:
Answered by stefangonzalez246
6

Height of the cloud from the surface of the cloud is 120 m.

Given    

To find height of the cloud from the surface of lake.

From the figure, AO be the height "h" of the cloud.

                           AO = h

             Where, CD = OB = 60 m.

                           EB = AB = AO + OB

                                          = 60 + h   -----> ( 1 )

From the figure,

                         In Δ AOD,

                                          tan 30° = AO / OD

                                             1 / \sqrt{3} = h / OD       ( tan 30° = 1 /\sqrt{3}  ;  AO = h )

                                                 OD = h × \sqrt{3}   -----> ( 2 )

                          In Δ EOD,

                                          tan 60° = OE / OD

                                                 \sqrt{3} = ( OB + BE ) / OD

                                          \sqrt{3}  × OD = OB + BE  

Using equation ( 2 ), OD = h × \sqrt{3}  

                                  OB = 60

                                   BE = 60 +h        

                                          \sqrt{3}  × h × \sqrt{3}  = 60 + 60 + h

                                                        3 h = 120 + h

                                                        3 h - h = 120

                                                               2 h = 120

                                                                   h = 60

Height of the cloud "h" is 60 m.

Height of the cloud from the surface of the cloud = AB + BE = 60 + 60 = 120.

To learn more...

brainly.in/question/1406121

brainly.in/question/5568131            

Attachments:
Similar questions