Question

the side of rectangle are x cm and 3cm. The peremeter os 24 cm . find x

Answer 1

Perimeter of a rectangle=2(x+3)

24 =2x+6

24-6 =2x

18 = 2x

9 =x

Answer 2

given length is x, breadth is 3cm.
perimeter is 24cm.
perimeter of a rectangle
is 2 ×length +breadth

2×(3 +x )is 24 cm


6 +2x=24

2x=18
x=9