If length of a rectangle is 3 times its breadth, find the expressions for its perimeter and area, given that the
breadth is b cm.
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6
Answer:
length = 3 breadth
l= 3b
perimeter = 2l + 2b
= 2( 3b) + 2b
= 6b + 2b
= 8b
area = l x b
= 3b x b
= 3b²
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