Posted by Anonymous on Thursday, September 16, 2010 at 8:10pm.
Can anybody help me with this? I don't understand?:
Tim paints 1 fence every two minutes. Moby paints 14 fences every two minutes. How many minutes will it take them to paint the fences, working together, if they have 150 fences to paint.
- Math - TutorCat, Thursday, September 16, 2010 at 8:26pm
1/2 + 2/14 = x/150
- Math - TutorCat, Thursday, September 16, 2010 at 8:28pm
- Math (correction) - TutorCat, Thursday, September 16, 2010 at 8:33pm
- Math - bobpursley, Thursday, September 16, 2010 at 8:50pm
Here is a common sense approach. In two minutes, they both paint 15 fences.
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
150=15/2 * time and you have it.
- Math (opps) - TutorCat, Thursday, September 16, 2010 at 9:00pm
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
Answer This Question
More Related Questions
- Algebra - mark can paint the fence in 40 minutes and manny can paint the fence ...
- Intermediate algebra, concepts and graphs - A garden is in the shape of a square...
- Math - If Phong paints 1 square yard in 2 minutes,how long will it take him to ...
- Math - Can you explain how to do this question? "Three clocks ring once at the ...
- math - Initially two painters are available to paint a picket fence. Peter alone...
- algebra - It takes Ted 20 minutes to paint a wall. Burt can paint the same wall ...
- Algebra - It takes Ted 20 minutes to paint a wall. Burt can paint the same wall ...
- math - Three clocks were set to ring at intervals as follows: the first after ...
- math - The Devon Avenue bus passes Max’s house every 9 minutes. The western bus ...
- Math - A family is moving and has a number of electronic devices in the same ...