A and B can do a piece of work for Rs.800. A alone can do it in 8 days while B alone can do it in 12 days. With help of C, they finish it in 4 days. Find the ratio of share of B and C.
  • a)
    5 : 4
  • b)
    3 : 4
  • c)
    1 : 5
  • d)
    2 : 1
Correct answer is option 'D'. Can you explain this answer?

SSC Question

SHIVANI TOMAR
Oct 09, 2019
From the given data,
A’s one day’s work = 1/8
B’s one day’s work = 1/12
C’s one day’s work = ¼ - (1/8 + 1/12) = 1/24
∴ A : B : C = ratio of their 1 day’s work = 1/8 : 1/12 : 1/24 = 3 : 2 : 1
∴ ratio of share of B and C = 2 : 1

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