Question
In a 600 ml solution, the ratio of milk to water is 3:2.
After adding ‘x’ ml each of milk and water, the ratio becomes 7:5. Determine the value of ‘x’.Solution
ATQ,
Milk = (3/5) × 600 = 360 ml
Water = 600 – 360 = 240 ml
ATQ:
(360 + x)/(240 + x) = 7/5
⇒ 5(360 + x) = 7(240 + x)
⇒ 1800 + 5x = 1680 + 7x
⇒ 2x = 120
⇒ x = 60
21 11.5 13 ? 45.5 116.75
...3 25 173 1041 5201 20809
10 a �...
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64, 60, 52, 40, ?, 4
5 10 40 80 320 640
4 a b c d e
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...Select the number from among the given options that can replace the question mark (?) in the following series.
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219 365 511 ? 803 949
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...
