Question
150 litres of a mixture (paint + oil) contains 20% oil.
How much oil should be added to make the ratio of paint to oil 5:3?Solution
Let the quantity of oil to be mixed be ‘x’ litres
According to the question,
(0.80 × 150)/(0.20 × 150 + x) = 5/3
120/(30 + x) = 5/3
Or, 5(30 + x) = 360
Or, 150 + 5x = 360
Or, 5x = 210 ⇒ x = 42
Therefore, quantity of oil to be mixed = 42 litres
More Mixture Questions
4/5 + 6/7 × 14/42 ÷ 24/35 = ?
- What will come in place of the question mark (?) in the following questions?
180÷3×2+6=? (8.4 × 6.5 ×2.52 )/(5.04 ×3.25 ×2.1) = ?
3? x 23 ÷ √ 256 = 40.5
- Find the value of the expression:
40 + 5 – 7 × [16 + 9 – 3 × (27 – 13)] If 28957.5 ÷ 268.125= 108, then 289.575 ÷ 2681.25 is equal to:
35% of 500 × 22% of ? = 847
300% of (3341 – 471) = ? × (√4225/195)
3.2% of 500 × 2.4% of ? = 288
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