- A16
- B24
- C20
- D18
Step-by-Step Solution
Let B's rate = , A's rate = ; together , so and A's rate = 2/36 = 1/18. A alone takes 18 days.
Answer: D) 18
A is twice as efficient as B. Working together they finish a work in 12 days. In how many days can A alone complete the work?
Competition practiceTime & Work / Pipes
Master this topic in 30 minutes a day.
Don't just memorise the answer — build a daily practice habit.
Practice 5 Similar Questions Free →All Time & Work / Pipes practice questions
More Time & Work / Pipes practice
Two hoses can fill a garden pool in 10 minutes and 15 minutes. Both are turned on, but…Three painters can each paint a school's compound wall alone in 10, 20 and 60 days. How…Vikram can plaster a room in 42 days and Sunil in 63 days. If both work on it together,…Ravi works three times as fast as Gopi. Together they complete a task in 9 days. How…A village tank is filled by pipe X in 22 hours and by pipe Y in 33 hours. If both pipes…