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Question: 100 kgs of an alloy of tin and lead in the ratio 1:3 is mixed with x kgs of an alloy of tin and lead in the ratio 3:2. If the overall alloy should contain between 40% and 50% tin, what is the range of values x can take?

(a) x lies between 100 and 200 kgs
(b) x lies between 80 and 240 kgs
(c) x lies between 110 and 220 kgs
(d) x lies between 75 and 250 kgs

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2 Comments

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  1. I solved it algebraically in the first ; but your method is amazing sir 👌👌

  2. chobiya ashwini 3 years ago

    Sir I did not understand how u r considering 20% in 100 kg n 15% in X kg to obtain 40% mixture. Can u please explain

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