Question
'A' and 'B' together can complete the work in 15 days.
'B' alone can complete the work in 30 days. If C is 50% more efficient than A, find the time taken by 'C' alone to finish the work.Solution
Let the total work be 120 units Combined efficiency of 'A' and 'B' = (120/15) = 8 units/day Efficiency of 'B' alone = (120/30) = 4 units/day Efficiency of 'A' alone = 8 - 4 = 4 units/day Efficiency of 'C' = 4 X (3/2) = 6 units/day Time taken by 'C' alone to finish the work = 120 ÷ 6 = 20 days
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.)...
5275 of 105% + 99.07 × 17.889 =?
...70.008% of 399.98 + ?% of 399.999 = 80.105% of 599.998
In a village election, 300 votes were declared invalid. The winning candidate secured 60% of the valid votes and won by a margin of 1,500 votes. Find th...
Solve the given equation for ?. Find the approximate value.
[(49.88% of 320.11) × (34.85% of 460.24)] ÷ √783.94 = ?
660 × ? + 495.85 - 60% of 9650 = 37.5% of 7200
(168.24 ÷ 23.98) x 19.81 + ? = 176.33
33.33% of 809.891 + 66.66% of 212.91 = ?
 (108.999)² - (102.001)²=?
What approximate value should come in the place of (?) in the following questions?
9.9 * [? – (4.9 * √576 ÷ 7.80)] = 950.05
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