Question
126 unit of work can be completed by P alone in 21 days.
P started working alone and joined by Q after 10 days such that they completed the remaining work in 4 days. Find the number of days taken by Q to complete the whole work alone.Solution
Let the efficiency of Q = x units/day Efficiency of P = (126/21) = 6 units/day According to question: 6 × 10 + (6 + x) × 4 = 126 Or, 60 + 24 + 4x = 126 Or, 4x = 126 – 84 Or, 4x = 42 Or, x = 10.5 Number of days taken by Q to complete the work alone = (126/10.5) = 12 days
95.001% of 8219.99 - 4/9 % of 5399.98 + 109.99 = ?
- 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.)
P spends 20% of his monthly income in travelling. He spends 25% of his monthly income on household expenses and spends 15% of his monthly income on fami...
3.98 × 29.67 ÷ 11.90 of √24.89 = ?% of 199.79
Find the digit at unit place of 12349.
- 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.)
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.)<...
- 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.)
√624.98 - ? = √(62.30 + 13.99 – 2.93)
(256.19 ÷ 63.99) 2.05 X (7.99) = 2 ? + 2.05
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