DocInTardis
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  • 19-05-2017
  • Mathematics
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tonb
tonb tonb
  • 19-05-2017
CB = DA = √3*3+1*1 = √10
CD = BA = √2*2+1*1 = √5

Sum is 2√10 + 2√5 ≈ 10.8. So answer A.
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