SOLUTION: I man can paint a house in 6 days and his son in 12 days. How many days will it take them if they painted it together?
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You can put this solution on YOUR website! I man can paint a house in 6 days and his son in 12 days.
How many days will it take them if they painted it together?
:
Let t = time required when doing the job together
:
Let the completed job = 1
:
Each will do a fraction of the job, the two fractions add up to 1
: + = 1
multiply by 12 to clear the denominators, results:
2t + t = 12
3t = 12
t =
t = 4 days together
;
:
Check it
4/6 + 4/12 = 1
