Question
The ratio of the number of fiction to non-fiction books in
a library is 4:7. If 16 more books of each type are added, the ratio becomes 8:13. Find the number of non-fiction books originally.Solution
ATQ,
Let the original number of fiction and non-fiction books be ‘4x’ and ‘7x’, respectively.
ATQ;
(4x + 16) / (7x + 16) = (8/13)
Or, 13 × (4x + 16) = 8 × (7x + 16)
Or, 52x + 208 = 56x + 128
Or, 4x = 80
Or, x = 20
So, the number of non-fiction books originally = 7 × 20 = 140
More Ratio Questions
15.001% of 799.99 - 3/11% of 1099.99 + 111.002 = ?
24.052 + 14.03 × 22.99 – 28.18 × 14.94= ?
(7.992/√?) + √16/? = 14.032/?
(1120.45 ÷ 15.89) × 11.34 = ? × 4.78
28.01% of 3650 + 40.10% of 150 – 301.75 = ?
25, 28, 26, 29, 27, ?
√3601 × √(224) ÷ √102 = ?
`[(7.99)^2 - (13.001)^2 + (4.01)^3]^2=` ?
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exactvalue.)
(56.04% of 550.06 + 19.92 × 18.13) – 121.97 = ?
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