SOLUTION: A and B can do a piece of work in 6 days, B and C can do it in 10 days and C and A can do it in 15 days.
(a)In how many days will A, B and C finish it working together?
(b)In how
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-> SOLUTION: A and B can do a piece of work in 6 days, B and C can do it in 10 days and C and A can do it in 15 days.
(a)In how many days will A, B and C finish it working together?
(b)In how
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Question 828250: A and B can do a piece of work in 6 days, B and C can do it in 10 days and C and A can do it in 15 days.
(a)In how many days will A, B and C finish it working together?
(b)In how many days will A and B finish their working alone? Answer by richwmiller(17219) (Show Source):
You can put this solution on YOUR website! 1)1/a+1/b =1/6,
2) 1/b+1/c=1/10,
add
1/a+2/b+1/c=1/6+1/10
3)1/a +1/c=1/15,
subtract
2/b=1/6+1/10-1/15
b=10
1/a+1/10=1/6
1/a+3/30=5/30
1/a=2/30=1/15
a=15
1/c=0
c=undefined
