Chapter 13 - Height and Distance

Example 5. The angles of elevation and depression of the top and bottom of a light house from the top of a building, 60m high, are 300 and 600 respectively. Find

(i) The difference between the heights of the light house and building.
(ii) Distance between the light house and the building.

Solution:- Let AB be the building and CE be the light house.

AD = BC =

tan 300 = DE/AD

(i) CE - CD = DE = 20m

(ii) Distance = AD = BC = 34.64m

 

Maths by Mr. M. P. Keshari
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Subjects Maths (Part-1) by Mr. M. P. Keshari
Chapter 9 Circle
Chapter 10 Tangents to a circle
Chapter 11 Geometrical Construction
Chapter 12 Troigonometry
Chapter 13 Height and Distance
Chapter 14 Mensuration
Chapter 15 Statistics
Chapter 16 Probability
Chapter 17 Co-ordinate Geometry