Question
The area of one face of the wooden cube is 900 cm2. A carpenter cut the wooden cube into three cuboids of identical size. After gluing the cuboids together to make a solid figure as shown, he painted all the surfaces of the solid figure black. What was the total surface area of the solid figure that had been painted black?
3 m

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The area of one face of the wooden cube is 900 cm2. A carpenter cut the wooden cube into three cuboids of identical size. After gluing the cuboids together to make a solid figure as shown, he painted all the surfaces of the solid figure black. What was the total surface area of the solid figure that had been painted black?