the perimeter of a rectangle is 20 cm if the length of the rectangle is 4 cm then its breadth will be
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Given , the perimeter is 20 cm .
breadth = x
length = 4 cm
formula for finding perimeter is
2(l+b)
=2(4+x) = 20
= 8+2x = 20
= 2x = 20 - 8
= x = 12/2
= x = 6
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