Question
In a 280-litre mixture (milk + water), the ratio of
quantities of milk and water is 3:4, respectively. How much water should be added to this mixture such that the ratio of the quantity of milk to that of water in the resultant mixture becomes 2:3?Solution
Initially, Quantity of milk in the mixture = {(3 × 280)/7} =120 liters Quantity of water in the mixture = {(4 × 280)/7} = 160 liters Let the quantity of water be added to the mixture = ‘x’ liters ATQ, {120/ (160 + x)} = 2/3 Or, 360 = 320 + 2x Or 2x = 40 x= 20 liters
- What will come in the place of question mark (?) in the given expression?
1231 + 1312 + 2113 – 3211 = ? Simplify the following expression:
84 - [21 - {14 - (25 - 16 + 8) }] ÷ 3 X 6
?% of 24% of 1200 + 12 × 11 = 204
154 × 7 + 480 × 5 =?% of 6956
- What will come in place of (?) in the given expression.
√324 + √121 – √49 = ? What will come in the place of question mark (?) in the given expression?
[{(24) 2 ÷ (6) 2 } ÷ 8]4 = ? ÷ 5
[(36 × 15 ÷ 96 + 19 ÷ 8) × 38] = ?% of 608
115 ÷ 23 + 12 × 6 = ? + 16 - 35
6 × 5.5 + 4.5 × 20 - 102 = ?