Question

12. The area of a rectangular piece of cardboard is 36 sq cm and its length is 9cm. What is the width
of the cardboard?

Answer 1

Answer:

the answer choice is 4 cm

Step-by-step explanation:

area of rectangle= L× B

hence 36=9× b

therefore b=4 cm

Answer 2

Given :

Length of a rectangular piece of cardboard  = 9 cm.

Area of a rectangular piece of cardboard  = 36 cm²

To Find :

Width of a rectangular piece of cardboard

Solution :

Let Width of a rectangular piece of cardboard be 'x'.

We know that,

Area = Length × Width

      

  36  = 9 × x

 

   x = 36/9

    x = 4 cm

Thus, width of a rectangular piece of cardboard is 4cm.

Formula Used :

Area of rectangle =  Length × Width