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For R3=30, R4=20, R5=60 ohm connected in parallel, the equivalent resistance is:

Question
For R3=30, R4=20, R5=60 ohm connected in parallel, the equivalent resistance is:
10 ohm
36.7 ohm
110 ohm
3.6 ohm
Answer
10 ohm
Detailed Explanation
1/R'' = 1/30+1/20+1/60 = 2/60+3/60+1/60 = 6/60 = 1/10, so R'' = 10 ohm.
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