at a fair ,a hawker sells 40 flutes for rupees 300 he had brought age for rupees 6 to another shell 70 flutes for RS 700 he had brought each from 6.50 rupees .who earned more profits ? by how much?
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Two forces of magnitudes k cos A and k cos B act along CA, CB of a triangle ABC . Prove that their resultant is k sin C. (B.Sc.86 Calicut; B.Sc. 79, 8 M.K.U.) [Hint:- Use the result that in a triangle cos^ 2 A+cos^ 2 B+cos^ 2; C=1-2 cos A cos B cos C]
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