## Explanation:In the mixture of 45 litre,
Hence, option B is correct.
## Explanation:Total mixture = 48 + 144 = 192 litre % of Glycerin = 48/ 192 × 100 = 25% = % of Rose water = 75% In the final mixture glycerin= 30%, Rose water = 70% (48 – D × 25% + 32) : (144 – D × 75% + 48) = 3 : 7 7 (48 – D × 25% + 32) = 3 (144 – D × 75% + 48) 7 (80 – 0.25 D) = 3 (192 – 0.75 D) 560 – 1.75 D = 576 – 2.25 D 2.25 D – 1.75 D = 576 – 560 Hence, option B is correct.
## Explanation:Let alchohol = 6x, water = 5x According to the question,
Hence, option D is correct.
## Explanation:Let required amount of second solution to be added = a L
Hence, option (D) is correct.
## Explanation:Given, quantity of the alloy = 200 gm. If Copper : Zinc = 2 : 3
⇒ x = 100 gm So The quantity of Copper to be added is 100gm Hence, option B is correct.
## Explanation:Let the quantity of Rs.5.4 per kg rice = x kg According to the question, x × 5.4 + 4.5 × 10 = 5.94 × (10 + x) ÷ 120 × 100 5.4x + 45 = 4.95 × (10 + x) Hence, option A is correct.
## Explanation:Let, Ducks = x, Rabbit = y As, Duck has 2 legs and rabbit has 4 legs, Hence, option A is correct.
## Explanation:Let the capacity of each be ‘a’ litre Then quantity of milk in container after mixing is
And quantity of water in container after mixing is ⇒ required ratio of milk to water after mixing
## Explanation:Let the required volume of water to be added = x ml When added to 7 ml lotion, the total volume = “7 + x” ml If the lotion contains 70% alcohol, then it contains 30% water If it contains 35% alcohol, it contains 65% water. By balancing the volume of water before and after dilution of the lotion, we get : (Amount of water in lotion before dilution) + (amount of water added) = (amount of water in lotion after dilution) (30% of 7) + x = (65% of “7 + x”) ⇒ ( 30 × 7 ) + x = 65 × 7 + x ⇒ 210 + 100x = 65 × (7 + x) Hence, option (C) is correct.
## Explanation:The quantity of milk in the mixture The quantity of water in the mixture= 35 – 20 = 15 litres Now, let the quantity of water added to the mixture be x litres. Then water becomes 60% of the total quantity of mixture.
⇒ 75 + 5x = 105 + 3x ⇒ 2x = 30
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How many litres of water needs to be added to 25 litres of a solution [#permalink] 31 Dec 2019, 02:23
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Question Stats: 73% (02:29) correct 27% (02:35) wrong based on 133 sessions ## Hide Show timer StatisticsHow many litres of water needs to be added to 25 litres of a solution having milk and water in the ratio 8 : 5, such that the resultant has milk and water in the ratio 5 : 8.A. 15 B. 20 C. 25 D. 30 E. 40 _________________
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Re: How many litres of water needs to be added to 25 litres of a solution [#permalink] 31 Dec 2019, 21:25
Bunuel wrote: How many litres of water needs to be added to 25 litres of a solution having milk and water in the ratio 8 : 5, such that the resultant has milk and water in the ratio 5 : 8.A. 15 B. 20 C. 25 D. 30 E. 40 \(\frac{8*25}{ 13(25+x)} =\frac{5}{13}\)solve for x 40 = 25+xthus x = 15thus A _________________
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Re: How many litres of water needs to be added to 25 litres of a solution [#permalink] 31 Dec 2019, 22:50
Bunuel wrote: How many litres of water needs to be added to 25 litres of a solution having milk and water in the ratio 8 : 5, such that the resultant has milk and water in the ratio 5 : 8.A. 15 B. 20 C. 25 D. 30 E. 40 Final quantity of water(8/13)*(25+X)Initial quantity of water[(5/13)*25]+X125+13X=200+8XX=15A:)
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Re: How many litres of water needs to be added to 25 litres of a solution [#permalink] 13 Jan 2020, 08:00the initial amount of milk=8/13 * 25=200/13 L;the amount of milk remains the same since water is only added;therefore, in the final ratio of milk: water =5:8-->5/13 *x=200/135x=200;x=40 Litres; initial amount=25 litres; so, 15 litres of water is added answer is A)
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Re: How many litres of water needs to be added to 25 litres of a solution [#permalink] 21 Jan 2020, 08:01
Bunuel wrote: E. 40 We can create the equation:8x + 5x = 2513x = 25x = 25/13So originally we have 8 * 25/13 = 200/13 liters of milk and 5 * 25/13 = 125/13 liters of water. Now we can let w = the number of liters of water added to the solution so that the ratio of milk to water is 5 to 8 and create the equation:(200/13) / (125/13 + w) = 5/85(125/13 + w) = 8(200/13)625/13 + 5w = 1600/135w = 975/135w = 75w = 15Answer: A _________________
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How many litres of water needs to be added to 25 litres of a solution [#permalink] 21 Jan 2020, 10:48=(1-8/13)/(8/13-5/13)=5/13So now 5/13=25/x=> x=15Can also be done by number line method Posted from my mobile device
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