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Q.

Ground radar reported the position of an enemy airplane as 10 km 37° north of east and altitude 1 km. As seen at the radar, the Indian plane is at10 km 37° south of west at an altitude 1km. Mark the CORRECT options.

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a

Distance between the Indian plane and the radar is 101 km

b

Distance between Indian plane and enemy plane is 20 km

c

Distance between the radar and the enemy plane is 101 km

d

Distance between Indian plane and enemy plane is 30 km

answer is A, B, C.

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Detailed Solution

 r1=8i^+6j^+1k^  r2=-8i^+6(-j^)+1k^  r1- r2=16i^+12j^  r1- r2 =162+122 =400=20 km

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