SOLUTION: Two welders working together can complete a job in 6 h. One of the welders, working alone, can complete the task in 15 h. How long would it take the second welder, working alone, t

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Question 1173835: Two welders working together can complete a job in 6 h. One of the welders, working alone, can complete the task in 15 h. How long would it take the second welder, working alone, to complete the task?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
first welder, rate 1%2F15
second welder, rate 1%2Ft
both welders at same time, 1%2F6


1%2F15%2B1%2Ft=1%2F6
LCD is 30t;
30t%281%2F15%2B1%2Ft%29=30t%281%2F6%29
2t%2B30=5t
3t=30
highlight%28t=10%29