7. The angle of elevation of a ladder leaning
against a wall is 60° and the foot of the ladder is 4.6 m away from the wall.
The length of the ladder is
A. 2.3 m B. 4.6 m
C. 7.8
m D. 9.2 m
Answer:
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Let AB be the
wall and BC be the ladder.
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Then, <ABC
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= 60°
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AC
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= 4.6 m.;
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AC/BC
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= cos 60°
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= 1 /2
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‹=›BC=2×AC
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=(2× 4.6) m
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=9.2 m
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Title :
Heights Q7
Description : 7. The angle of elevation of a ladder leaning against a wall is 60° and the foot of the ladder is 4.6 m away from the wall. The length of...
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