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primary 5 | Maths
| Area & Volume

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Help by today please

In the side of length 30 cm, 5 blocks can be placed.

In the side of length 20 cm, 7 blocks can be placed.

Total number of blocks placed is 5 x 7 = 35.

This leaves a gap of 10 cm by 150 cm at the corner, which is allowed.

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