Amount

9' 2", 2' 9"

markr,

Please post your solution. Thanks.

Don't do it.

The whole point of this kind of assignment is to find out if you can think. If someone supplies you with the method (which is simple algebra) then your teacher may wrongly believe you can think and you will soon have more problems.

You need to look at the question and work out what you already know. You know that the numbers of wanted feet and inches, when reversed, gives the feet and inches supplied. Further, you know that the supplied length is 30% of the wanted length. You knew already there are 12 inches in one foot. (That is a hint) You will have recently been taught about using algebra to find unknown quantities. Review these lessons and think about expressing the problem as an equation.

Good enough, make the lad word a tad.

That is the point and purpose of school assignments. To give the the pupil practice in thinking, to give the pupil increasing confidence when he or she solves problems, and to enable the teacher to evaluate the pupil's progress. None of these things happen if the pupil cheats.

It's not even all that hard to do it the dumb way

I did not know how to solve it. As stated before, I have been out of school over 30 years. I tried to use what is known and want to know, but was unsure how to proceed.

hello..............

Hello.

So why are you doing this? Why does it matter? Where did you say you have been out of school 30 years?

You can do it this way:

You know that the customer asked for F feet and I inches but actually got I feet and F inches.

F and I must be less than 12 (Can you see why?)

You could compare pairs of lengths like this until you found a received length that was 30% of the requested length. Easier if you convert the feet and inches to just inches at each step.

Requested, received
11 ft 10 inches, 10 ft 11 inches
11 ft 9 inches, 9 ft 11 inches
11 ft 8 inches, 8 ft 11 inches

etc

(You can obviously skip lengths where ft/ins are the same, such as 8 ft 8 inches)

"So why are you doing this? Why does it matter? Where did you say you have been out of school 30 years?"

I came across the question on the Internet. I thought it was an interesting problem. I didn't know how to solve it and just asked for assistance from some math/algebra experts. The other questions are for the same reason. I have stated on other posts that I have been out of school for that amount of time.


"F and I must be less than 12 (Can you see why?) "
No- I thought it could be any amount.

Post an algebraic solution also.
Thanks.

The clue is the sales person reversed the feet and inches. You wouldn't ask for 6 feet and 12 inches of rope, would you?



Any amount? There are only two amounts, the amount asked for, and the amount received.

Perhaps you should find a different hobby?

let x be the number of feet and y the number of inches.

customer wanted x ft and y in and received y ft and x in

y*12+x=0.3(x*12+y)
12y+x=3.6x+0.3y
11.7y=2.6x
9y=2x

9 ft 2 in =110 in
2 ft 9 in=33 in
110in*0.3=33 in

yeppur

Rap

Thanks.