Question
Working alone, B can complete the work in 30 days. C is
twice as efficient as B and A takes 20 days more than it takes C to complete the work. Working together, in how much time would they be able to complete 9 such works?Solution
Time taken by B to complete the work = 30 days
Time taken by C to complete the work = 30/2 = 15 days
Time taken by A to complete the work alone = 20 + 15 = 35 days
Work done by A, B and C together in 1 day.
⇒ (1/30 + 1/15 + 1/35) = (7 + 14 + 6)/210 = 27/210
this means if would take 210/27 days for A, B and C to complete the work together
∴ Time taken A, B and C to complete 9 works = 9 × 210/27 days = 70 days
More Time and work Questions
Determine the value of k such that the points A(2,3), B(4,k), and C(6,-3) lie on the same straight line.
Solve the given equation for ?. Find the approximate value.
(3/5 of 399.78 + 7/9 of 360.15) ÷ (√63.94 + 25% of 383.94) = ?
...[{(√785) % of 449.85}/(35.89 × 7.14 + 849.89 ÷ 5.12 + 199.78% of 41.09)] = ( 1/? )Â
65.22 of 359.98% + 459.99 ÷ 23.18 = ?
{(23.65 × 35.12) ÷ 6.97} + 179.86 = ? × 14.76
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.)
What will come in place of the question mark (?) in the following series?
50, 25, 25, ?, 75, 187.5
What approximate value will replace the question mark (?) in the following?
? + 1...
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