2023 · Q7
Three persons A, B and C together can do a piece of work in 36 days. A and B together can do five times as much work as C alone; B and C together can do as much work as A alone. If A and C together can do n times as much work as B alone, then what is the value of n?
Elementary MathematicsTime and Work
- A1.5
- B2
- C2.5
- D3
Explanation
A+B+C=1/36, A+B=5C gives C=1/216; B+C=A gives A=1/72; then B=1/108. (A+C)/B=(1/54)/(1/108)=2, so n=2. Option (b).