Question

9. A can do a piece of work in 10 days, B in 18
days, and A, B and C together in 4 days. In
what time would C do it alone ?​

Answer 1

Step-by-step explanation:

व्दिएह्च्र्ह्द्क्व्वीछेविव्द्ब्2इ

Answer 2

Answer:

A can do a piece of work in = 10 days

B can do a piece of work in = 18 days

(A + B + C) can do a piece of work in = 4 days

∴ A’s 1 day work = 1/10

B’s 1 day work = 1/18

(A + B)’s 1 day work = 1/10 + 1/18 = (9 +5)/90

= 14/90 = 7/45

(A + B + C)’s 1 day work = ¼

∴ C’s 1 day work =1/4 – 7/45

= (45 – 28)/180 = 17/180

∴ C can do the piece of work in = 180/17 days

= 10. 10/17 days