Question

18 The perimeter of a rectangle is 13cm. and its width is 2 cm. find it's area
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Answer 1

Step-by-step explanation:

Perimeter of rectangle = 13 cm

Width (b) = 2 cm

Length (l) = ?

• perimeter = 2 × (l+b)
• 13 = 2 × (l + 2)
• 13 = 2 l + 4
• 2 l = 13 -4
• 2 l = 9
• l = 9/2 = 4.5 cm

Area of rectangle = length × width

= 4.5 × 2 = 9 cm²

Answer 2

so the area of rectangle is 9cm²

Step-by-step explanation:

perimeter of rectangle =13cm

width=2cm

perimeter of rectangle =2(l+b)

let the length be x

2(x+2)=13cm

2x+4=13

2x=13-4=9

2x=9

x=9/2=4.5

Area of rectangle=l x b

=(4.5 x 2)cm²

=9cm²