It takes Sam 10 hours to construct a wall of a certain size. It takes Jim 6 hours to construct the same wall. How long would it take if they worked together?
1 Answer
May 1, 2017
Explanation:
We can tackle such type of problem in the following way:-
It takes Sam 10 hours to construct a wall. It means that in 1 hour, Sam constructs
Similarly, it takes Jim 6 hours to construct the wall. Therefore, in 1 hour, Jim constructs
Hence, if they work together, the amount of wall constructed in 1 hour will be
We know, now, that in 1 hour,