Question

Hannah has a grid of squares that has 12 rows with 15 squares in each row. She colors 5 rows of 8 squares in the middle of the grid blue. How many squares does Hannah color red?

Answer 1

Answer:Number of squares colored red= 180-40= 140 squares

Explanation:

Hannah has a grid of squares that has 12 rows with 15 squares in each row. This means the length of the gris is 15 squares and the breadth is 12 squares.

Area of grid = length × breadth

=15×12 = 180

She colors 5 rows of 8 squares in the middle of the grid blue. This means the part coloured blue has a length of 8 squares and breadth of 5 squares.

Area of blue colored part = 8×5 = 40

Number of squares colored red= total number of squares - number of square colored blue= 180-40= 140 squares