A and B can do a piece of work in 12 days, B and C in 15 days, and C and A in 20 days. how much time will A alone take to finish the job?
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Answer:
A alone takes10 days to finish the job
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Answer:
8.5
Step-by-step explanation:
A+B=12
B+C=15
C+A=20
A=12-B. (1)
B=15-C. (2)
C=20-A. (3)
FROM EQUATION 2
B=15-20+A.
B=-5+A. (4)
FROM EQUATION 1AND4
A=12+5-A
A+A=17
2A=17
A=17/2
A=8.5
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