Posted by Anonymous on Thursday, September 16, 2010 at 8:10pm.
1/2 + 2/14 = x/150
2/1+14/2=150/x
Here is a common sense approach. In two minutes, they both paint 15 fences.
amount=rate*time
150fences=15fences/2min * time
time= 150*2/15=20 min
Now a more analytical approach.
The combined rate is the rate of each added.
ratecombined= 1fence/2min+14fence/2 min
= 15fence/2 min
fencestotal= ratecombined*time
150=15/2 * time and you have it.
opps! be sure to write the units out because I accidentally wrote 2 min/1 fence instead of 1 fence/ 2 min.
1 fence/2 min +14 fence/2 min= 150 fence/x min
Related Questions
math - paul paints a house in 4 hours, mike paints the same house in 6 hours. ...
visual art - Interested in the basic aspects of drawing and painting....
math - Amy paints a house in 4 hours and Thomas paints the same house in 6 hours...
Cda - Two children using finger paints agree to share them. They are engaged in
play - if two child is using finger paints, they are engaging in what kind of ...
child care - two children using finger paints agree to share them. They're ...
Art - If a painter paints 8 different pictures to get a better perspective and ...
math - i dont understand this question. 2+(9*9)= ?
College Algebra - A gardener wants to fence in her plot in two equal rectangular...
math - two runners jog around an oval path at constant rates, but in opposite ...
For Further Reading
