Friday

August 22, 2014

August 22, 2014

Posted by **carolyn** on Monday, September 15, 2008 at 11:27am.

- crayon riddle 8th grade -
**bobpursley**, Monday, September 15, 2008 at 11:39amThe amount of crayon left is the original length-amount used.

The amount used depends on time. Now if one assumes both were the same original length (not stated in problem), then

lengthskinny=orglength-time*origlength/6

lengthfat=origlength-time*origlength/15

so if lenghtskinny=1/2 lengthfat, then

1/2lengthfat=Lo(1-time/6) and

lengthfat=Lo(1-time/15)

I would divide the first equation by the second...

1/2= (1-time/6)/(1-time/15)

multiply both sides by 2(1-time/15)

and it ought to solve quickly.

Nice problem: compliments to the originator.

**Related Questions**

linear equations - Rachel has two crayons. The fat crayon burns down to nothing ...

linear equations - Rachel has two crayons. The fat crayon burns down to nothing ...

Math - A jar contains 1 blue crayon, 1 green crayon, 1 black crayon, and 1 red ...

Math ms sue please help!!!!!! - Simple probability You have 20 crayons to choose...

Probability - CHECK ANSWERS - I have an eight pack of crayons. Colors red, green...

math - a store donates 2 3/4 cases of crayons to a daycare center. each case ...

science - you left a crayon in the window sill in the bright sunshine. It melted...

Physics - A skier wears a jacket filled with goose down that is 15mm thick. ...

Physics - A skier wears a jacket filled with goose down that is 15mm thick. ...

Physics - The image of a crayon appears to be 20.6 cm behind the surface of a ...