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Question

Radhika made a solution by dissolving 40 g of salt in 100 g of water. Her friend, Saloni took 50 g solution from the solution prepared by Radhika and added 5 g more salt to it. The final concentration (w/w%) of this new solution will be (approximately)

राधिका ने 100 g जल में 40 g नमक को घोलकर एक विलयन बनाया। उसकी दोस्त सलोनी ने राधिका द्वारा बनाये गये विलयन से 50 g विलयन लिया तथा इसमें 5 g और नमक मिलाया। इस नये विलयन की अंतिम सान्द्रता (w/w%) (लगभग) होगी

A
35%
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B
30%
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C
40%
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D
55%
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Solution

The correct option is A 35%

Solution

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