Mathematics
A can do a piece of work in 24 days, A and B can do it in 16 days and A, B and C in days. In how many days can A and C do it working together?
Direct & Inverse Variations
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Answer
A's 1 day work =
(A + B)'s 1 day work =
B's 1 day work = (A + B)'s 1 day work - A's 1 day work
=
=
=
(A + B + C)'s 1 day work =
(A + C)'s 1 day work = (A + B + C)'s 1 day work - B's 1 day work
=
=
=
A + C can do the work in days
Hence, A + C can do the work in days.
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