Question
A factory has a 720-litre solution of acid and water mixed
in a 5:4 ratio. If 30% of this solution is removed and replaced with an equal amount of water, what is the new ratio of acid to water in the final mixture?Solution
ATQ;
Quantity of acid in the solution = (5/9) × 720 = 400 litres
Quantity of water in the solution = (720 – 400) = 320 litres
Quantity of solution taken out = (0.3 × 720) = 216 litres
New ratio = {400 – (400 × 0.3)} : {320 – (320 × 0.3) + 216}
= 280 : 440
= 7:11
?% of 24% of 1200 + 12 × 11 = 204Â
The sum of two numbers is 16 and their product is 63. The sum of their reciprocal is equal to:
20 * 8 + 40% of 100 + 60% of 150 = ?
What will come in the place of question mark (?) in the given expression?
(72 × 4 – 92) ÷ 14 = ?
[564 + 32 of 18 × 9 ÷ 12 + 162 ] ÷ 4 = ?
125% of 80 – 6 × 4 = ? × 13 – 54
6 × 1.8 × 0.25 × 70 = ? + 9.5
6612 ÷ 19 - ?% of 240 = -2196
15% of ? = 30% of 320 + 17 ×√676 – 63.5 × 8
What will come in the place of question mark (?) in the given expression?
