Wei Ming built the solid shown using identical 1-cm cubes for his D&T project at school. How many cubes did he use altogether to build this solid?
Show Worked Solution
Worked Solution
Step 1: Look at the solid as two rows of cubes (a front row and a back row). Count cubes column by column.
Step 2: Front row (closer to you): column 1 has 2 cubes stacked, column 2 has 1 cube, column 3 has 0 cubes (empty position). Front-row total = 2 + 1 + 0 = 3 cubes.
Step 3: Back row (further from you): column 1 has 1 cube, column 2 has 2 cubes stacked, column 3 has 1 cube. Back-row total = 1 + 2 + 1 = 4 cubes.
Step 4: Add both rows: 3 + 4 = 7 cubes.
Final answer: Wei Ming used 7 cubes altogether.
Answer: 7 cubes
Correct answer: 7 cubes
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