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Question

Vectors a\=3i^−5j^ and b\=2i^+4j^ are given. What is the magnitude of a×b?

Options

Choose one · Correct answer highlighted

Explanation

a×b = |i^j^k^3−50240| = k^(3×4−(−5)×2) = k^(12+10) = 22k^. Magnitude = 22. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 22. This satisfies dimensional consistency and physical conditions given, so option C is scientifically correct.