Take the 2-minute tour ×
Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. It's 100% free, no registration required.

Find the area of a square in square inches whose side is 1.3 ft?

I keep getting this one wrong I would think that 1.3 feet is 16 inches and then multiply that by that by sixteen but that is not the correct answer.

share|improve this question
    
$1.3$ feet is not $16$ inches. –  Chris Eagle May 5 '12 at 19:22
    
$1.3$ feet is $1.3\cdot 12=15.6$ inches. –  Brian M. Scott May 5 '12 at 19:22

1 Answer 1

One thing that can help when doing unit conversions is properly setting up your fractions. In this case, you need $$ \frac{1.3\text{ ft}}{1}\times \frac{12\text{ in}}{1\text{ ft}} = 15.6\text{ in} $$ Now it's clear from the fractions that you have to multiply 1.3 by 12 to convert feet to inches. The area of a square is $s^2$ where $s$ is the length of a side, so the area is $(15.6)^2=243.36$ square inches (don't forget the units).

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.