A b and c can do a piece of work in 11 days 20 days respectively working alone
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0
LCM(11,20,55) = 220.
Let total work is 220 units such that,
Work done by A in 1 day =
220
11
=
20
units
Work done by B in 1 day =
220
20
=
11
units
Work done by C in 1 day =
220
55
=
4
units
First day, A and B work and completes 20+11=31 units of work
Second day, A and C work and completes 20+4=24 units of work
So, in every 2 days, 31+24=55 units of work gets completed.
in 8 days, 4×55=220 units of work gets completed.
Therefore, ans is 8 days
Hope it helps ✌✌❤
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hope it works ✌
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