3 men and 4 boys can do a piece of work in14 days , while 4 men and 6 boys do the same work in 10 days . How long would it take one man to finish the same work?
1/14 = 3/m + 4/b
1/10 = 4/m + 6/b
m = 70
b = 140
1/10 = 4/m + 6/b
m = 70
b = 140