Question

The perimeter of arectangle is 140cm,if its breadth is 30cm find its length. Pls ans with explanation

Answer 1

2(l+b)=140
2(l+30)=140
2l+60=140
2l=140-60
l=80/2
=40 answer

Answer 2

Perimeter of a rectangle =2*(l+b)
140=2(l+30)
140/2=l+30
70=l+30
70-30=l
L=40