Question

the velocity of an aeroplane P related to the steady wind is 36 km/h in the direction 60° north of East. the velocity of another aeroplane Q relative to the same steady wind is 18 km/h to 60° south of West. the speed of the aeroplane P w.r.t aeroplane Q will be
1)15/2 m/s
2)15/√3 m/s
3)15 m/s
4)15√3 m/s

please answer me

Answer 1

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4) $15 \sqrt{3}$

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