3 AN OVERHEAD WATER TANK IS BUILT ON A HORIZONTAL GROUND. THE CURIOUS ENGINEER WANTS TO FIND THE HEIGHT OF THE WATER TANK SO HE WALKS DUE WEST OF THE OVERHEAD WATER TANK AND MEASURES THE ANGLE OF ELEVATION TO BE 28.4 DEGREES. HE THEN WALKS ON THE SOUTH DIRECTION OF THE WATER TANK AND MEASURES THE ANGLE OF ELEVATION TO BE 23.6 DEGREES. THE DISTANCE BETWEEN TWO POINTS IS 72.8m. QUESTION: WHAT IS THE HEIGHT OF THE OVERHEAD WATER TANK?
3 AN OVERHEAD WATER TANK IS BUILT ON A HORIZONTAL GROUND. THE CURIOUS ENGINEER WANTS TO FIND THE HEIGHT OF THE WATER TANK SO HE WALKS DUE WEST OF THE OVERHEAD WATER TANK AND MEASURES THE ANGLE OF ELEVATION TO BE 28.4 DEGREES. HE THEN WALKS ON THE SOUTH DIRECTION OF THE WATER TANK AND MEASURES THE ANGLE OF ELEVATION TO BE 23.6 DEGREES. THE DISTANCE BETWEEN TWO POINTS IS 72.8m. QUESTION: WHAT IS THE HEIGHT OF THE OVERHEAD WATER TANK?
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Question
Please illustrate and solve the problem. thankyou
Transcribed Image Text:SINE LAW:
b
d
KU
C
NOTE :
C
COSINE LAW:
$
a
sing sinß
=
으.
c²=a² +6²-2abcos C
6²=a²+ c² - 2accos &
a²=b²tc²-2bccos a
Cangle C
Sin C
WE USE SINE LAW IF THERE ARE
AT LEAST TWO SIDES WITH ONE
INCLUDED ANGLE.
WE USE COSINE LAW IF THERE ARE
TWO KNOWN SIDES WITH ONE UNKNOWN
ANGLE.
Transcribed Image Text:3 AN OVERHEAD WATER TANK IS BUILT
ON A HORIZONTAL GROUND. THE CURIOUS
ENGINEER WANTS TO FIND THE HEIGHT OF
THE
WATER TANK SO HE WALKS DUE
WEST OF THE OVERHEAD WATER TANK
AND MEASURES THE ANGLE OF ELEVATION
TO BE 28.4 DEGREES. HE THEN WALKS
ON THE SOUTH DIRECTION OF THE WATER
TANK AND MEASURES THE ANGLE OF
ELEVATION TO BE 23.6 DEGREES. THE
DISTANCE BETWEEN TWO POINTS IS 72.8m.
QUESTION:
WHAT IS THE HEIGHT OF THE
OVERHEAD WATER TANK?
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