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A certain number of men can finish a piece of work in 50 days. If there are 7 more men ,the work can be completed 10 days earlier. How many men were

originally there. Please show equation and working


Let the original no of men be x
 x men can finish in 50 days
x+7 men can do it in y days
 applying uintary method
y= 50x/x+7
given y =40
40= 50x/x+7
solving x =28
0 0 0
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