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Previous Year Question (PYQs)
A
and B can complete a work in 15 days. B and C can complete the same work in 20
days. If A, B and C together can finish it in 10 days, then A and C can
complete the same work in____days.
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One Day work of A+B = 1/15One Day work of B+C = 1/20
Lwt One Day work of A+C = 1/x
One Day work of A+B+C = 1/10
2.One Day work of A+B+C =(One Day work of A+B)+(One Day work of B+C)+(One Day work of A+C)
$\frac{2}{10}=\frac{1}{15}+\frac{1}{10}+\frac{1}{x}$
x=12
A+C can complete the same work in 12 days.
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