Question
Ramesh has a rectangular block of wood 9 cm by 4 cm by 7 cm. He painted all the faces of the block.
(a) What is the total painted area?
(b) Ramesh cut the block into 1-cm cubes. How many of these cubes have only 1 of their faces painted?
Solution
![P6 / ACS / 2020 / SA2 / Paper 2 – Q15 [4 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2020/09/P6_ACS_2020_SA2_Paper2_Q15-Qns.jpg?resize=400%2C260&ssl=1)
![P6 / Catholic High / 2020 / SA2 Prelims / Paper 2 – Q15 [4 marks]](https://i0.wp.com/sgprimaths.com/wp-content/uploads/2021/06/P6_SA2_2020_Catholic_High_Paper2_Q15-Qns.jpg?resize=400%2C260&ssl=1)