Trusted by millions of Kenyans
LoginRegister
Study resources on Kenyaplex

Get ready-made curriculum aligned revision materials

Exam papers, notes, holiday assignments and topical questions – all aligned to the Kenyan curriculum.

Browse exam papers
Or go directly to:
Class notes Holiday assignments Topical questions Other resources

The angle of elevation of the highest point of a building from two points S and T are 60o and 30o

The angle of elevation of the highest point of a building from two points S and T are 60o and 30o.T is vertically above S and ST = 10 m. Calculate the height of the building above the level S.

Answers

Raphael
$Tan \ 30^o = \frac{1}{\sqrt 3} = \frac{x}{d}$

$= x \sqrt 3$

$Tan \ 60^o = \frac{x + 10}{d}$

$\sqrt 3 = \frac{x + 10}{d}$

$d = \frac{x+ 10}{\sqrt 3}$

$x \sqrt 3 = \frac{x + 10}{\sqrt 3}$

3x = x + 10

2x = 10

x = 5

$\therefore AB,$ the height of building = 10 + 5 = 15 metres
raphael answered the question on January 20, 2017 at 06:18

Answer Attachments

Next: What are the challenges facing Economic Community of West African States(ECOWAS)?

Previous: How does the study of CRE build our relationship with God?

View more Mathematics Questions and Answers  |  Return to Questions Index

Exams With Marking Schemes

Related Questions