Chapter 2 - Fundamentals of Electric Circuits - Part 1 Circuits - Homework Problems - Page 57: 2.49

Resistance=52.6190 ohm

1000 ohm parallel with 100 ohm so $1000*100/(1000+100)$=90.90 ohm 9.1 ohm is in series with 90.90 ohm so $9.1+90.90$=100 ohm 100 ohm parallel with 100 ohm so $100*100/(100+100)$= 50 ohm 50 ohm is in parallel with 1000ohm so $50*1000/(50+1000)$=47.6190 ohm Now 5 ohm is in series with 47.6190 ohm So $5+47.6190$=52.6190 ohm