Question

The ratio of efficiencies of A, B and C is 2:5:3. Working together, they can complete the work in 27 days. B and C together can complete 4/9th part of that work in?

Answer 1

Answer:

15 days

Step-by-step explanation:

efficiency ratio of A, B & C => 2 : 5 : 3

so there efficiency when working together = 2+5+3 = 10

& time taken by them to complete a work working together = 27 days

now

work = Time × efficiency

=> work = 27 × 10 = 270

so,

B & C can do 4/9th part of the work in =>

270 × 4/9 = 30×4 = 120

work to be done = 120

& efficiency of B & C = 5 & 3

=> Total efficiency = 5+3 = 8

Time = work/efficiency = 120/8

=> Time = 15 days (answer)