Question

Work out the area of a rectangle with base,
b
= 14mm and perimeter,
P
= 36mm

Answer 1

Answer:

Area of rectangle = 56 mm²

Step-by-step explanation:

First of all find length

perimeter = 2(l+ b)

36 =  2(l+ 14)

l+ 14 = 36/2

l = 18 - 14

l = 4

length is 4mm

Now,

area of rectangle = l x b

    area = 4 x 14 = 56

Area of rectangle = 56 mm²

Answer 2

length of rectangle = base = 14mm

perimeter = 36mm

To find breadth of the rectangle

Perimeter of rectangle = 2 (length + breadth)

36 = 2(14 + breadth)

36/2 = 14 + breadth

18 = 14 + breadth

breadth = 18 - 14

breadth = 4mm

Area or rectangle = length × breadth

= 14 × 4

= 56 mm²