<PRE><B>Question 1015256</B>
perimeter 80 cm 
length 28 cm 
breadth = ?

We typically call the dimensions length and width. Here, breadth is used instead of width. 

Perimeter is simply the sum of the 4 sides, i.e. 2L+2B

2L+2B=80   
2(28)+2B=80
56+2B=80
2B=24
B=12cm
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