Question

10. A, B and C working together can do a piece of work in 8 hours. A alone can do it in 20
hours and B alone can do it in 24 hours. In how many hours will C alone do the same
work?​

Answer 1

Answer:

30 hours

Step-by-step explanation:

A+B+C : A : B : C

Efficiency = 15 : 6 : 5 : 4

Now,

E1 × T1 = E2 × T2

15×8 = 4×T2

T2 = 30