Question

Rectangular park of Perimeter =80m, Area =400m so find the length and breadth​

Answer 1

Hey pudding,

    I just have a question, which grade are you??

That doesn't matter anyways, coming to point

Given:

perimeter = 80 m  [perimeter of rectangle = 2(l+b)]

area = 400 m. square [area of rectangle = l x b]

sol;

2(l+b) = 80 m........................... eq. 1

l x b  = 400 m. sq.................... eq. 2

(l+b) = 80/ 2

l + b = 40 m

l = 40 - b m............................... eq. 3

using  eq. 3 in eq. 2

l x b = 400 m. sq

(40 - b) x b = 400

40b - b² = 400

 b² - 40b +400 = 0

solving b,

we get b = - 20 m......

cheers...