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in Vector Algebra – I by (49.1k points)
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If vector|a + b| = 60, vector|a - b| = 40 and vector |b| = 46, then vector |a| is ...

(a) 42 

(b) 12 

(c) 22 

(d) 32

1 Answer

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Best answer

(c) 22

vector|a + b| = 60, vector|a - b| = 40 and vector |b| = 46,

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