Problema Solution
sam can build a shed in 5 hours. if his son helps him build the shed it only takes 3hours. how long dose it take his son to build the shed by himself
Answer provided by our tutors
Sam can build 1/5 of the shed in 1 hours
His son can build 1/x of the shed in 1 hour, where x is the total number of hours his son needs to build the shed by himself.
Together they can build 1/3 of the shed in 1 hour thus
1/5 + (1/x) = 1/3
x = 7.5 hours
Sam's son needs 7.5 hours to build the shed by himself.