You can
put this solution on YOUR website!A boy can do a piece of work in 15 days & his father ca do it in 10 days. How long will it take them to do the work together?
:
Let x = time required to complete the job together
:
Let the completed job = 1
:
+
= 1
:
multiply equation by 30, to get rid of the denominator
30*
+ 30*
= 30(1)
:
Cancel out the denominators and you have:
2x + 3x = 30
5x = 30
x = 30/5
x = 6 hrs working together
:
:
Check solution. Substitute 6 for x:
+
= 1
+
= 1
