Question

Oops,, haha.. last three

Answer 1

Explanation:

1）

`shaded \: parts = 20 \\ cans \: of \: paint \: needed = 20 / 6 \\ = 3 (1)/(3) \\ = 4`

2）63cm^2（just counting）

3）

`area \: of \: shaded \: parts = 3 * 3 \\ = 9`