Posted by b6 on Saturday, October 13, 2012 at 9:27pm.
There are three pieces of rope with the lengths 15 1/3feet, 20 1/2 feet, and 30 3/4 feet.
A) how many yards in all?
B) If thery were all cut into 3 feet pieces how many would you get and how did you determine this answer
C) How much rope is left? How was that determined

math  b6, Saturday, October 13, 2012 at 10:08pm
I di try and answer them on my own and got A) 22 7/36 yards of rope.
B) 22 pieces
C) 7/12 of the rope was left.
Please help, are these correct?
If not can you explain and help me understand the question. Thanks

math  Reiny, Sunday, October 14, 2012 at 12:26am
a) correct
b)
from the 15 1/3 ft piece we can cut 5 pieces of 3 ft, leaving 1/3 ft
from the 20 1/2 ft piece we can cut 6 pieces of 3 ft, leaving 2 1/2 ft
from the 30 3/4 ft piece we can cut 10 pieces of 3 ft leaving 3/4 ft
so we can cut 5+6+10 or 21 pieces of 3 ft each
c) amount left over:
1/3 + 2 1/2 + 3/4
= 3 7/12 ft

math  b6, Sunday, October 14, 2012 at 8:57am
for partB) since for each part that was left was more than 3 feet as you see in part C won't that be added as one more foot making the answer to B) 22 pieces
and part C) 7/12 left?

math  Reiny, Sunday, October 14, 2012 at 10:10am
I read the question to mean that you want complete 3 ft sections, not pieces that have been tied together to make 3 ft.
from a piece of 20 1/4 ft, I can only get 6 sections of 3 ft, even though a big piece would be left over.
Let's agree it is a poorly worded question.
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