Question
Person A is 40% more efficient than person B, while person
C is 40% less efficient than person B. All three—A, B, and C—can together finish a task in 35 days. If only A and B work on the task for the first 40 days, how many additional days will C alone need to complete the remaining work?Solution
Let efficiency of ‘B’ is ‘x’ units per day
Efficiency of ‘A’ = 1.40 × x = 1.4x units per day
Efficiency of ‘C’ = 0.60 × x = 0.6x units per day
Total work = (1.4x + x + 0.6x) × 35 = 105x units
Amount of work done by ‘A’ and ‘B’ together in 40 days = 40 × (1.4x + x) = 96x units
Desired time = (105x – 96x)/0.6x = 15 days
19.89% of 449.67 + 14.67% of 299.89 - 9.89% of 99.79 = ?
`(sqrt(960.87)xx9.932+sqrt(629.998)xx26.385)/(sqrt(1028.902)xx4.977)=?`
Find the approximate value of Question mark(?). There is no requirement to find the exact value.
? = 200.14 + 27.98 × 16.05 − (10.03)² - 12.9...
- 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.)...
1299.999 ÷ 325.018 × 24.996 = ?
What approximate value should replace the question mark?
99.95 − √529 × 3 + 1439.80 ÷ 12.02 = ?
619.97 ÷ 20.01 X 124.99 ÷ 24.91 = ?
124% of 620.99 + 11.65% of 1279.23 = ?
What approximate value should replace the question mark?
9.96% of 1200.10 − 25% of 4800 = ? − 7000.20
