# Mechanics of matericals algebra question

1. Jul 14, 2009

### CRich

mechanics of matericals .... algebra question

I'm currently in Mechanics of Materials and I have reduced my problem to something similar to: 510/7.6=8.25/((pi/4)*d^2)

how do I solve for d? I have been given the answer (from the back of the book) but i don't remember how to solve for d......by the way the above numbers are random and not from my text.....but it is similar...thx crich

2. Jul 14, 2009

### minger

Re: mechanics of matericals .... algebra question

Are you familiar with the concept of inverse operations?
$$\frac{510}{7.6} = \frac{8.25}{(\pi/4)d^2}$$
You can multiply the pi/4 to the otherside, divide by 8.25, inverse both sides, then take the square root.