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Answer:
1 day work of x = 1/25
1 day work of y = 1/20
1 day work.of x + y = 1/25 + 1/20
= 9/100
1 day work is 9/100
then 5 day work will be 5 * 9/100
9/20
Now remaining work = 1 - 9/20
= 11/20
1 day work of x = 1/25
Days in which x will complete the remaining work = 11/20 ÷ 1/25
= 11/5
Therefore, x will complete the remaining work in 5/11 days.
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