Wednesday
June 19, 2013

Homework Help: math 156

Posted by Rmz on Wednesday, December 9, 2009 at 2:02pm.

A land developer wants to develop 20 acers of land. Each lot in the development is to be 4/5 of an acer. How many lots will the developer have in 20 acers?

is it 16 lots?

• math 156 - Ms. Sue, Wednesday, December 9, 2009 at 2:03pm

If each lot is less than one acre, then the developer must have more than 20 lots.

• math 156 - Rmz, Wednesday, December 9, 2009 at 2:15pm

How would you work the problem? I tried dividing and multypling and it gives the same answer?

• math 156 - Ms. Sue, Wednesday, December 9, 2009 at 2:20pm

20 divided by 4/5 = 20 * 5/4 = 100/4 = 25

• math 156 - Rmz, Wednesday, December 9, 2009 at 2:55pm

Ok, but isnt 20 divided by 4/5 equal to 25 and therefore 25*5/4= 31 1/4

• math 156 - Ms. Sue, Wednesday, December 9, 2009 at 3:07pm

Whoa -- you're making it more complicated.

The developer will have 25 lots on his 20 acres.

Let's work that backwards.

25 * 4/5 = 100/5 = 20 acres. That works!

• math 156 - Rmz, Wednesday, December 9, 2009 at 3:42pm

So it is 25 lots not 31 1/4?

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