solve urgently.....plz as soon as............
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series=20+10+20=50
parallel=1/30+1/50
8/150
150/8
=18.75
again from a to b in series
10+18.75+10
=38.75....ans
parallel=1/30+1/50
8/150
150/8
=18.75
again from a to b in series
10+18.75+10
=38.75....ans
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