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Q.

To go from town A to town B a plane must fly about 1780 km at an angle of 30⁰ West of north. How far north of A is B ?

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a

$11 km$

b

$1452 km$

c

$1254 km$

d

$1542 km$

answer is A.

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Detailed Solution

Question Image

$From △ ACB$

$\cos 30 = \frac{A C}{AB}$

$\Rightarrow A C = 1780 \times \frac{\sqrt{3}}{2} ≃ 1541.52 Km$

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