In the given circuit diagram R1=5ohm, R2=10Ohm and R3=20ohm calculate that total resistance of circuit
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1/Rs=1/R1+1/R2+1/R3
⇒1/Rs=1/5+1/10 | CROSS MULTIPLY
=15/50
⇒50/15=3.33
1/3.33+1/20 | CROSS MULTIPLY
23.33/66.66
⇒66.66/23.33=2.85
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