Question

A rectangle is composed to 15 squares. The three middle squares of a rectangle was painted.How many non-painted squares are there if there are 20 rectangles?Solution please.

Answer 1

Answer:

Follow the Above Image For Better Understanding

Answer 2

Answer:

240

Step-by-step explanation:

A rectangle is composed of 15 squares. The three middle squares of a rectangle were painted.

According to the question,

A rectangle is composed of 15 squares and three middle squares of a rectangle were painted.

So, the non-painted square in a rectangle is $15-3=12$.

And the non-painted square in 20 rectangles is $12X20=240$.

Hence, 240 non-painted squares are there if there are 20 rectangles.