The length of a rectangle is 4 cm and the perimeter is 24 cm. Find the breadth.

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A 6 cm
B 10 cm
C 8 cm
D 12 cm

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Answer: C. 8 cm

Let: Perimeter is 'P', Length is 'l' and Breadth is 'b'.
P=2(l+b)
24 cm=2(4+b) cm
24/2 cm=(4+b) cm
12 cm=(4+b) cm
12-4 cm=b cm
8 cm=b

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The length of a rectangle is 4 cm and the perimeter is 24 cm. Find the breadth.

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