Math, asked by laxmanpathi945, 9 months ago

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Answered by apoorvan36

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Step-by-step explanation:

Work done by A in 1 day=1/21

Work done by B in 1 day= 40%of A's work +A's work

=40/100*1/21+1/21

=7/105 =1/15

15 days

Therefore work is completed by B in 15 days

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