From the top of a 7 metre high building, the angle of elevation of the top of the cable tower is 60 degree and the angle of depression of its foot in 30 degree. determine the height of the tower. (i got the height as 28m ..is it correct?)

Dear Student,

Please find below the solution to the asked query :



Let AB be the building and CD be the cable tower.Now, AB = 7 mLet CD = h mDraw AL  CD.Now, LD = AB = 7 mNow, CL = h - 7 mLet CAL = 60°    and    ADB = 30°In ABD,tan 30° = ABBD 13 = 7BD BD = 73 mIn  CLA,tan 60° = CLAL 3 = h - 7BD 3 = h - 773 h - 7 = 21 h = 28So, height of cable tower = 28 m

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  • 3
No the answer is 21cm.
 
  • 1
i dont know
  • -1
if my answer is wrong ...give the correct solution plz 
  • 0
your answer 28 m is correct. i have just tried it now.
 
  • 1
it is 28 m. correct ans.........
  • 1
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