A-platform-and-a-building-are-on-the-same-horizontal-plane-The-angle-of-depression-of-the-bottom-C-of-the-building-from-the-top-A-of-the-platform-is-39-The-angle-of-elevation-of-the-top-D-of-the-b

Question Number 13737 by chux last updated on 22/May/17

A platform and a building are on

the same horizontal plane . The

angle of depression of the bottom

C of the building from the top A

of the platform is 39 ° . The angle of

elevation of the top D of the

building from the top of the

platform is 56 ° . Given that the

distance between the foot of the

platform and that of the building

is 10 m, calculate the height of the

building to the nearest whole

number .

Commented by chux last updated on 23/May/17

please help its urgent

Answered by ajfour last updated on 23/May/17

Commented by ajfour last updated on 23/May/17

h = B C + B D

= A B \tan 39 ° + A B \tan 56 °

= A B (\tan 39 ° + \tan 56 °)

= (10 m) (3.0) = 30 m .

Commented by chux last updated on 23/May/17

thanks sir \dots . please can I see the

solution

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