Question

Rectangle Question : The length of a rectangle is four times its width. If the area of the rectangle is 400cm squared, what is the perimeter?

Answer 1

Answer:

Step-by-step explanation:

Let l be length,b be the breadth.

l=4b (given)

Area = 400 m2

But area of rectangle = l * b

l * b = 400

(4b)b=400

4b^2=400

b^2=400/4=100

b=sq(100)=10

b=10

l=4b=4(10)=40

l=40

Perimeter = 2(l+b)=2(10+40)=2(50)=100

Answer 2

Let breadth be x and length be 4x
According to the question,

Area=l*b
400 square =4x*x
400 square=4x square
400/4=x square
100=x square
x=10cm

Breadth is 10cm and length is 40cm.