Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions

A pole 5m high is fixed on the of a tower.the angle of elevation of the top of pole observed from a point A on the ground is 60degree and the angle of

depression of the point A from the top of the is 45degree.findthe height of the tower.(take root3=1.732)
something is missing after.." the point A from the top of the .... is 45.."
the point A from the top of the tower is 45


Tan 60°=BD/AB
⇒ √3=BD/AB
 ⇒ AB=BD/√3.....(i)

tan 45°=BC/AB
  ⇒ 1=BC/AB
 ⇒  AB=BC.....(ii)

From (i) and (ii)
(BC+5)=√3 BC
 5=1.732 BC-BC
BC=5/0.732=6.83 m

1 2 1

This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Let the height of the tower be h 

so \angle{BAD}=90-45=45°

the distance of the point A from the foot of tower be b

so so tan 45 = \frac{h}{b}

⇒ b = x   {tan 45° = 1}

for ΔABC  \angle{BAC}=60°

so tan 60° = \frac{x+5}{x}

⇒ √3x = x + 5 

⇒ 0.732x = 5

⇒ x ≈ 6.83 m ANSWER
2 5 2
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts