A ladder 15 m long just reaches the top of a vertical wall. If the ladder makes an angle of 60° with the wall, then calculate the height of the wall. (2013OD)
Answers
Answered by
3
Answer:
Let the length of the ladder be =15m(hypotenuse)
The angle between the ladder and the wall ∠BCA=60
∘
Angle between ladder and the ground ∠CAB=90
∘
−60
∘
=30
∘
Height of the wall =BC
sin30
∘
=
15
BC
⇒
2
1
=
15
BC
⇒BC=
2
15
=7.5m
Answered by
1
Answer:
answer=7.5m
Step-by-step explanation:
Let the length of the ladder be =15m(hypotenuse)
The angle between the ladder and the wall ∠BCA=60
∘
Angle between ladder and the ground ∠CAB=90
∘
−60
∘
=30
∘
Height of the wall =BC
sin30
∘
=
15
BC
⇒
2
1
=
15
BC
⇒BC=
2
15
=7.5m
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