Good qn....plz post ur solutions

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A mason employed a certain number of workers to finish constructing a wall in a certain scheduled time. Some time later he realized that the work would get delayed a by a fourth of the scheduled time, so he immediately increases the number of workers by a third and thus manages to finish the wall on schedule. Some time the work force was increased, all of the newly added workers left due to an issue regarding wages while at the same time the remaining workers reduced their efficiency by half as a mark of protest against low wages. If the work finally got completed with a delay of 50% of the scheduled time then

Qn 1)).What fraction of the total work was still incomplete by the end of the scheduled time?
 

Qn 2)). Find the percent of the work that was finished by the time the work force was increased??

Plz post solutions with details......

 

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