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Mary and John can do a piece of work in 24 days; John and Vino in 30 days; Vino and Mary in 40 days. If Mary, John and Vino work together they will complete the work in

πŸ—“ Nov 21, 2024

Answer is "20 days"

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votes
DK - Tamilnadu 🌐 Tamil Nadu
M+J+J+V+V+M=1/24+1/30+1/40
we have to find M+J+V
then,
2(M+J+V)=12/120
2(M+J+V)=1/10
M+J+V=1/20
All together complete the work in 20 days.
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Prajakta ~ Bengaluru 🌐 India
2(A+B+C)=1/24+1/30+1/40

=12/120 taking L.C.M

=1/10

=1/10*2

= 1/20

All together complete in 20 days.
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... ~ Mangalore 🌐 India
Why multiply by 2?
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Anonymous 🌐 Karnataka
Y multi by 2 only
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