Thomas can do a piece of work in 80 days. He works at it for 10 days and then Ajay

Thomas can do a piece of work in 80 days. He works at it for 10 days and then Ajay alone can finishes the remaining work in 42 days. Together they could complete the work in:
(a) 24 days
(b) 25 days
(c) 30 days
(d) 35 days

Anurag Mishra Professor Asked on 4th May 2016 in Maths.
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    Answer: (c) 30 days 

    Anurag Mishra Professor Answered on 4th May 2016.
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