Question

The length of a rectangle is 7cm more than its breadth. If the perimeter of the rectangle is 90 cm, find its length and breadth

Answer 1

hello!

breadth=x cm
length=(x+7) cm
Perimeter=90 cm

BTP,
2 (x+7+x)=90
=>2x+14+2x=90
=>4x+14=90
=>4x=76
=>x=19

Breadth=19 cm
Length=26 cm

hope it helps... :)

Answer 2

breadth = x
length = x + 7

perimeter = 2( l+ b) = 90
2( x + 7 + x ) = 90
2( 2x + 7 ) = 90
4x + 14 = 90
4x = 90 - 14 = 76
x = 76/4
x = 19

Therefore : breadth = 19cm
length = 19 + 7
= 26cm