Question
Fresh grapes contain 90% water and dried grapes contain
20% water. From 20 kg of fresh grapes, how many kgs of dried grapes can be obtained?Solution
Let the weight of dry grapes obtain from 20 kg of fresh grapes is Y kg According to the question The quantity of water in 20 kg of fresh grapes is 20 × 90% 18 kg The remaining weight of 20 kg of fresh grapes is 20 - 18 2 kg Now, 2 kg of weight is equal to 80% of dry grapes, then Y × 80% = 2 Y = (2 × 5)/4 Y = 2.5 kg ∴ The required weight of dry grapes is 2.5 kg.
3, 10, 29, 66, ?
62, 87, 137, ?, 312, 437
27 28 32 41 57 ?
...5 6 14 45 ? 925
...5, 5, 15, 75, ?, 4725
- What will come in place of the question mark (?) in the following series?
121, 115, 102, 82, 55, ? What value should come in the place of (?) in the following number series?
5670, 1620, 540, 216, 108, ?
Find the missing number in the given number series.
3, 7, 18, 38, 69, ?What will come in place of the question mark (?) in the following series?
3, 8, 18, 38, ?, 158
12, 18, 30, 54, ?, 198
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