Question

HEMANTH CUTS OF A square of side 3cm from a rectangular card board sheet of length 10cm and breadth 8cm. Analyse how you can find its area and perimeter

Answer 1

Answer:

The area and perimeter of the square is $9cm^{2}$ and 12cm respectively.

Step-by-step explanation:

The side of the square cut off from the cardboard sheet of length 10cm and breadth 8cm is given as 3cm.

The area of a square is calculated using the following formula:

Area = side × side

Here side = 3cm

Therefore,

Area = 3cm × 3cm

        = $9cm^{2}$

The perimeter of a square is calculated using the following formula:

Perimeter = 4 × side

Since side = 3cm

Perimeter = 4 × 3cm

                = 12cm.

Therefore the area and perimeter of the square is $9cm^{2}$ and 12cm respectively.

Answer 2

Answer:

Step-by-step explanation:

side of square =  3cm

area of square cut  =  side  * side

                                =  3 *3 = 9cm sq.

length of rectangle  = 10cm

breadth of rectangle = 8cm

so total  area of the rectangular  card board =  length * breadth

                                       = 10 *8

                                       = 80 cm sq

so the area of the rectangular card board after the square is cut off

(area of reatangle - the area of the square ) = 80 cm sq - 9 cm sq

                                                                        = 71cm sq

so the perimeter of the rectangular  after the square cuts of is

 8+7+3+3+5+10 = 36cm