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MR. Asif can do a job in 10 days. after working 3 days, he hires a helper and two completed the job in another 5 days. How long would it take have taken the helper to complete the task alone?

 Oct 29, 2020
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Asif works for 3 days....   now the job has 7 days remaining for Asif alone

1/7   + 1/x  = 1/5

 

solve for x = 17.5 days for the slow assistant to finish the remaining job without Asif

 Oct 29, 2020

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