Aptitude - Time and Work - Discussion
Discussion Forum : Time and Work - General Questions (Q.No. 26)
26.
A and B can do a work in 8 days, B 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
Explanation:
| (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 |
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So, A and C together will do the work in 8 days.
Discussion:
53 comments Page 2 of 6.
Tanveer sayyed said:
3 years ago
5/24 how? anyone explain.
(1)
Ivan said:
3 years ago
Thanks for explaining @Parveen Verma.
(1)
PRASHANT VERMA said:
6 years ago
1/8+1/12-1/6=1/24.
BECAUSE A+B = 8
B+C = 12
A+C = ?
A+B+C = 6.
BECAUSE A+B = 8
B+C = 12
A+C = ?
A+B+C = 6.
Dimple said:
8 years ago
Thank you for all your explanations.
Vikas said:
8 years ago
Thanks for the explanation.
Deep said:
7 years ago
Thanks @Parveen.
Santosh said:
7 years ago
A+B ....8 DAY- 3unit. L.C.M-24 UNIT
B+C......12 DAY - 2 unit.
A+B+C......6 DAY -(24/6)...4 unit .
Then,
A+B+C=4. A+B=3....(3+C=4 =C=1)
C=1.
B+C=2 UNIT .....C=1.
B=1.
A+B=3.
B=1.
A=2 .
A and c's work.
A+c=2+1=3 unit per day,
Total work =24 unit,
A+c=24/3=8 day.
B+C......12 DAY - 2 unit.
A+B+C......6 DAY -(24/6)...4 unit .
Then,
A+B+C=4. A+B=3....(3+C=4 =C=1)
C=1.
B+C=2 UNIT .....C=1.
B=1.
A+B=3.
B=1.
A=2 .
A and c's work.
A+c=2+1=3 unit per day,
Total work =24 unit,
A+c=24/3=8 day.
Chary said:
7 years ago
good explanation, thanks all.
Rohit kushwaha said:
7 years ago
Thank you @Bhanu.
Nav said:
7 years ago
Why can't we simply subtract A+B's 1-day work from B+C's 1-day work to get A+C's 1-day work?
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