Turn on thread page Beta
 You are Here: Home >< Maths

# Area word problem watch

1. so i'm back to my pre-calc packet, yay!. i went through it the first time and after getting help with 2 questions, i've come back because i forgot about another question whose answer doesn't feel right at all...

"A farmer has 1200 yards of fencing. find the maximum area that can be enclosed by the fencing. consider a variety of shapes including rectangles, squares and circles."

I assumed a circle was the best option but ended up with a ridiculous number. here's what i did:

circumference = 1200 so. and

then the for the area... which comes out as 114,591.559yards^2. which seems obscenely high. i did it with a circumference of 10 and came out with about 8 so i figure something that far off can't be right. so if someone just wants to check my work and tell me what i'm doing wrong?? thanks guys
2. it's right.

600^2 is large...
3. Why don't you try it for circumferences of 20, 30 and 40? The obscenely high figure (which looks right to me, by the way) comes from the fact that you square the radius in finding the area, but not in finding the circumference; put another way, area is proportional to the square of the circumference.
4. really? ha well that beats my square with 900yards^2 then.

thanks man, again.
5. (Original post by Anick14)
really? ha well that beats my square with 900yards^2 then.

thanks man, again.
the square had 90000 yards^2...
6. (Original post by Totally Tom)
the square had 90000 yards^2...
yeah i noticed what i said that after i sent it. my friend sent me a simplified problem and i mixed up papers. i promise, i understand.

Reply
Submit reply
Turn on thread page Beta

### Related university courses

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: July 17, 2009
Today on TSR

### AQA Mechanics Unofficial Markscheme

Find out how you've done here

### 2,809

students online now

Exam discussions

Poll
Useful resources

## Make your revision easier

### Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

### How to use LaTex

Writing equations the easy way

### Study habits of A* students

Top tips from students who have already aced their exams

Can you help? Study help unanswered threads

## Groups associated with this forum:

View associated groups

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.