Answer:
l = 65m
b = 60m
Step-by-step explanation:
length = l
breadth = b
perimeter = 2 (l + b) = p
now l = 5 + b
p = 2 (l + b) = 250
substitute l = 5 +b in the above equation
2 (5 + b + b) = 250
2 (5 + 2b) = 250
10 + 4b = 250
4b = 240
b = 60
then l = 5 + b
= 65
