Question

Five square pieces each of side 3 cm are cut from a rectangular board 9 cm long and 7 cm wide
What is the area of the remaining part of the board?​

Answer 1

Answer:

18 cm^2

Step-by-step explanation:

area of rectangular board= l*b= 9 cm*7 cm= 63 cm^2

area of one square piece = s^2= 3^2= 9 cm^2

area of 5 square piece = 9*5= 45cm^2

area of remaining part= 63 - 45

                                 = 18 cm^2

Answer 2

Answer:

If the five square pieces each of side 3 cm are cut from a rectangular board 9 cm long and 7 cm wide then the area of the remaining part of the board​ is  18 sq. cm.

Step-by-step explanation:

Given:

Side of square = 3 cm

Length of rectangular board = 9cm

Breadth of rectangular board = 7cm

Find:

Area of square

Area of rectangle

Formula:

Area of square = side × side

Area of rectangle = length × breadth

Step 1:

If Side of square = 3 cm

Then area of square = side × side = 3× 3 = 9 sq. cm

Area of 5 square pieces = 5 × 9 = 45 sq. cm

Step 2

If Length of rectangular board = 9cm and Breadth of rectangular board = 7cm

Then Area of rectangle = length × breadth = 9 × 7 = 63 sq. cm

Step 3:

Area of remaining part = Area of rectangle - Area of 5 square pieces

= 63 - 45

= 18 sq. cm.