Multiple choice

In a solution water is 45%. When 18 liters more water is added the new concentration of water becomes 60%. Find the initial quantity of water in the solution. एक विलयन में 45% पानी है। जब और 18 लीटर पानी मिलाया जाता है तो पानी की नई सान्द्रता 60% हो जाती है। विलयन में पानी की प्रारंभिक मात्रा ज्ञात कीजिये।

  1. 36 liter/लीटर

  2. 27 liter/लीटर

  3. 25.8 liter/लीटर

  4. 21.6 liter/लीटर
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D Correct answer
Explanation

Set up the equation based on water amounts. Let the initial total solution be T liters. Water increases from 45% of T to 60% of (T+18). Solving: 0.45T + 18 = 0.60(T+18) gives T = 48 L, so initial water = 0.45 × 48 = 21.6 L.

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