Some Applications of Trigonometry
CH09 Question Bank
CBSE_CH09_QUESTION_BANK
Grade 10
Question:
A kite is flying at a height of $30\sqrt3$ m, attached to a string making an angle of $60^\circ$ with the ground. Find the length of the string.
Step-by-Step Solution
Key Concept: Apply sinθ = height/string length.
$\sin60^\circ=\dfrac{30\sqrt3}{L}\Rightarrow \dfrac{\sqrt3}{2}=\dfrac{30\sqrt3}{L}$. [1.0 Mark]
$L=\dfrac{30\sqrt3\times2}{\sqrt3}=60$ m. [1.0 Mark]
Correct Answer:
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