Question
A solution contains acid and water in the ratio 2:3. After
adding 4 litres of acid and 3 litres of water, the ratio becomes 3:4. What was the initial quantity of the mixture?Solution
ATQ,
Let acid = 2y, water = 3y
(2y + 4):(3y + 3) = 3:4
⇒ 4(2y + 4) = 3(3y + 3)
⇒ 8y + 16 = 9y + 9
⇒ y = 7
Initial quantity = 2y + 3y = 5y = 5 × 7 = 35 litres
564.932 + 849.029 – 425.08 = 612.095 + ?
999.99 + 99.99 + 99= ?
A sum of ₹60,000 is invested at a compound interest rate of 'x%' per annum, compounded annually, and grows to ₹75,264 in 2 ye...
What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)...
³√? × 33.97 + 59.99 × 28.9 – 48.98 × 21.42 = 1085.344
1279.98 ÷ 40.48 × 10.12 = ? × 2.16
(124.901) × (11.93) + 219.95 = ? + 114.891 × 13.90
What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)...
