A and B can complete a task in 12 days together. A is 25% more efficient than B. What percentage of the work is done by A alone?
55.56%
Since A is 25% more efficient than B, the ratio of their efficiencies is \(A:B = 125:100 = 5:4\).
Let A's daily work rate be \(5k\) and B's be \(4k\), so their combined rate is \(9k\) per day.
Together they complete the work in 12 days, so \(9k \times 12 = 1\) (total work), giving \(k = \frac{1}{108}\).
The percentage of work done by A alone (out of the combined work) is \(\frac{5k}{9k} \times 100 = \frac{5}{9} \times 100\).
Calculating, \(\frac{5}{9} \times 100 = 55.56\%\).
Hence, the answer is 55.56%.
Similar Questions
- Sameer can complete a work in 16 days. In how many days will the work be completed by Ajay, if his efficiency is 60% more than that of Sameer?
20 women can do work in 16 days. 10 men can complete the same work in 12 days. What is the ratio between the efficiency of a man and a woman?
- A can complete a task in $30\text{ days}$, and B can complete the same task in $40\text{ days}$. They work together for $10\text{ days}$, and then C joins them and completes the remaining work in $5\text{ days}$. How long will C alone take to complete the task?
- The efficiency of A, B and C is 2 : 3 : 5. A alone can complete the work in 40 days. They all worked together for 5 days and then C left the work. In how many days can A and B together complete the remaining work?
Important Questions from Work Efficiency
Sumi can complete a job working 5 hours per day in 2 days. If she doubles her working hours per day, then in how many days will she complete the work?
Five men and 2 boys can do in 30 days as much work as 7 men and 10 boys can do in 15 days. How many boys should join 40 men to do the same work in 4 days?
A man completes 7/8 of a job in 21 days. How many more days will it take him to finish the job if quantum of work further increased by 50%?
24 men and 12 women can do a piece of work in 30 days. In how many days can 12 men and 24 women do the same piece of work?
3 men working 7 hours a day can complete a piece of work in 45 days. In how many days will 9 men working 6 hours a day complete the same work?
