Question

find the breadth of a rectangular plot of length 45m and having perimeter 140m also find its atea

Answer 1

perimeter = 140 m = 2 ( length + breadth )
140/2 = ( length + breadth )
70 - 45 = breadth
breadth = 25m

Area of a rectangle = length × breadth
= 45 × 25
= 1125 cm^2

Answer 2

given 2(l+b)=140 m
also given l=45
then,
2(45+b)=140
45+b=70
b=25 m

area = l*b = 45 * 25 = 1125m^2

hope this helps...!!