Question
Efficiency of a man is 20% more than that of a woman.
(n - 10) men working 6 hours a day can complete a task in 15 days, whereas (n - 9) women working 8 hours a day can complete the same task in 12 days. Find the time taken by (n - 3) men and (n - 4) women working 9 hours a day to complete the task.Solution
Let the efficiency of a woman be '5e' units/day. Then, efficiency of a man = (6/5) × 5e = '6e' units/day. ATQ; (n - 10) × 6 × 15 × 6e = (n - 9) × 8 × 12 × 5e Or, 540n - 5400 = 480n - 4320 Or, 60n = 1080 Or, 'n' = 18 Total work = (n - 10) × 6 × 15 × 6e = 8 × 6 × 15 × 6e = '4320e' units So, required number of days to complete the work = 4320e ÷ [(15 × 6e + 14 × 5e) × 9] = 4320e ÷ (160e × 9) = 4320e ÷ 1440e = 3 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.)
- 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 =?
...- 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.)...
(5.08/3.01) of 41.99 - 24.99% of 120.09 = ? - 9.99
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.)...
2550.03 ÷ 74.98 x 49.9 = ? + 20.32
? + 151.99 – 100.01 = 23.01 × 4.98
Relevant for Exams:
