Question

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Answer 1

R=

$16 \sqrt{6}$

$\sqrt{150} = \sqrt{25 \times 6} = 5 \sqrt{6}$

$\sqrt{54} = \sqrt{9 \times 6} = 3 \sqrt{6}$

$p = l + l + l + l \\ p = 5 \sqrt{6} + 5 \sqrt{6} + 3 \sqrt{6} + 3 \sqrt{6} \\ p = 16 \sqrt{6}$