SOLUTION: 16 men can finish a work in 12 days. After they worked for 4 days, some more men joined them and they together completed the remaining work in 4 days. How many more men joined in

Question 986070: 16 men can finish a work in 12 days. After they worked for 4 days, some more men joined them and they together completed the remaining work in 4 days. How many more men joined in ?
Found 2 solutions by ikleyn, josgarithmetic:
Answer by ikleyn(52835) (Show Source): You can put this solution on YOUR website!
.
16 men joined in.

Answer by josgarithmetic(39623) (Show Source): You can put this solution on YOUR website!
r, rate of one man in JOBS per DAY;
n, unknown number of men WHO JOINED IN, after the four days;

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