A rectangle is 3p cm long and 2p cm wide. Find the perimeter of the rectangle when p = 12.

102 cm

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120 cm

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210 cm

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10p cm

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Solution

The correct option is B 120 cm
Perimeter = 2(l + b)
= 2(3p + 2p)
= 2 (5p) = 10p cm
$∴$ Perimeter when p = 12 cm is 10(12) = 120 cm.

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