SOLUTION: Thomas did a job in 4hrs and mary does the same job in six hrs how many hrs will it take both of them

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Question 893393: Thomas did a job in 4hrs and mary does the same job in six hrs how many hrs will it take both of them
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
a=4
b=6
1/a+1/b=1/x
1/4+1/6=1/x
1/4+1/6=1/2.4
1/x=1/2.4
x=2.4