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Question

A can do a piece of work in 40 days and B in 45 days. They work together for 10 days and then B goes away. In how many days wil A finish the remaining work?


Solution

A's 1 day work =140

B's 1 day work =145

A and B's 1 day work =140+145

=9+8360=17360

A and B's 10 days work =17360×10=1736

Remaining work =11736=361736=1936th

Now A can do 1 work in =40 days

He will do 1936 work in =40×1936

=10×199=1909

=2119days


Mathematics
RD Sharma
Standard VIII

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