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The thread of a kite makes angle 60° with the horizontal plane. If the length of the thread be 80 m, then the vertical height of the kite will be
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40 metre √3 - 80 √3 metre
- 80 metre
- 40 √3 metre
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Correct Option: D
AB = Length of thread
= h metre
= 80 metre
∠BAC = 60°
BC = Vertical height of kite
In ∠ABC,
| sin 60° = | AB |
| ⇒ | = | 2 | 80 |
| ⇒ h = 80 × | = 40√3 metre | 2 |
