Question
A and B can do a work in 8 days, 13, and C can do the same work in 12 days. A, B and C together can finish it in 6 days. A and C together will do it in_________?
Answer: Option C
(A + B + C)’S 1 DAY’S WORK = 1/6; (A + B)’S 1 DAY’S WORK = 1/8 (B + C)’S 1 DAY’S WORK = 1/12 (A + C)’S 1 DAY’S WORK = ( 2 X 1/6 ) – ( 1/8 + 1/12 ) = ( 1/3 – 5/24 ) = 3/24 = 1/8 SO, A AND C TOGETHER WILL DO THE WOIRK IN 8 DAYS.
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(A + B + C)’S 1 DAY’S WORK = 1/6; (A + B)’S 1 DAY’S WORK = 1/8 (B + C)’S 1 DAY’S WORK = 1/12 (A + C)’S 1 DAY’S WORK = ( 2 X 1/6 ) – ( 1/8 + 1/12 ) = ( 1/3 – 5/24 ) = 3/24 = 1/8 SO, A AND C TOGETHER WILL DO THE WOIRK IN 8 DAYS.
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