Question
Working alone, ‘X’ and
‘Y’ can complete a work in 16 days and 10 days, respectively. They started working together but after 4 days, ‘Y’ was replaced by ‘Z’ and the work got finished in the next 4 days. Find the time taken by ‘Z’ alone to finish the whole work.Solution
Let the total work be 80 units (LCM of 16 and 10).
Combined efficiency of X and Y = 5+8=13 units/day. Work done by X and Y together in 4 days = 13×4=52 units. Remaining work = 80−52=28 units. 
Efficiency of Z = 7−5=2 units/day.
More Time and work Questions
√323.89 × (3.20) ÷ 9.02 =?
- 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.)
23.98% of 624.99 = 19.98% of ? + 14.98% of 639.99
Direction: Please solve the following expression and choose the closest option
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.)
12, 16, ?, 36, 52, 72
- 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.)
(6859.01)1/3 × 10.11 × 14.47 ÷ 20.32 = ? + 45.022
33.33% of 809.891 + 66.66% of 212.91 = ?
