x does 7 10 part of work in 15 days After that he completes the remaining work in 4 days with the he...........

Quantitative Aptitude (CDS) Time and work

x does 7/10 part of work in 15 days. After that, he completes the remaining work in 4 days with the help of y. IN how many days will x and y together do the same work?

30/4 days

40/3 days

34/9 days

55/8 days

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Explanation:

According to question,
Let total work be 1 unit,
X and y complete 1-7/10 = 3/10 of work in 4 days.
They will complete the whole work in 3/10 work in 4 days.
1 work in 4×10/3 = 40/3days.