Question
In a 150-liter mixture, the ratio of petrol to diesel is
4:1. To obtain a final mixture with 25% diesel, how much diesel needs to be added to the existing mixture?Solution
ATQ, Quantity of petrol in the original mixture = 150 × (4/5) = 120 liters Percentage of petrol in the new mixture = 100% - 25% = 75% Total quantity of mixture that contains 75% petrol = 120 ÷ 0.75 = 160 liters So, quantity of diesel to be added = 160 - 150 = 10 liters
If 'a' = √1024 ÷ 4 + 96 ÷ 3 + 85 ÷ 17 and 'b' = 30 × 18 ÷ 6 - 7² + 110, then find the value of (a + b).
...The greatest number that will divide 398,436, and 542 leaving 7, 11, and 15 as remainders, respectively, is:
What approximate value should come in place of question mark (?) in the following equations?
39.9% of 1720 + 80.2% of 630 = 89.9% of 1280 + ?
? = (5.8)2 + (8.9)2 + (4.7) 2 + 24.7% of 20
?% of (128.31 ÷ 15.97 × 75.011) = 419.98
What approximate value will replace the question mark (?) in the following?
29.99...
- 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.)
(11.11 ×  31.98) + 14.15% of 749.99 = ? + 124.34
456 x 99.999 + 654 = ?
Find the digit at unit place of 12349.
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