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## Homework Statement

Find the total resistance of this circuit:

each resistance in this circuit is 20ohms.

(r1=r2=r3=r4=r5=r6=r7=r8=20ohms)

## Homework Equations

Rt=r1+r2+r3... for series

1/Rt=1/r1+1/2r+1/r3... for parallel

## The Attempt at a Solution

since r4 and r5 is parallel to r6

so r4 to r6

= 1/(1/(20+20)+1/20)

=13.333333333333

r7 is in series with r4 to r6

r4 to r7

=13.333333333333+20

=33.333333333333

r3 is parallel with r4 to r7

r3 to r7

=1/(1/33.333333+1/20)

=12.5

r8 is in series with r3 to r7

r3 to r8

=12.5+20

=32.5

r2 is parallel with r3 to r8

r2 to r8

=1/(1/32.5+1/20)

=12.38

r1 is in series with r2 to r8

rt

=20+12.38

=32.38

yea i got it and i think it's right except my friend said it's wrong but i can't figure out where