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Question

The external dimensions of a closed wooden box are 48 cm, 36 cm, 30 cm. The box is made of 1.5 cm thick wood. How many bricks of size 6 cm × 3 cm × 0.75 cm can be put in this box?

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Solution

The outer dimensions of the closed wooden box are 48 cm×36 cm×30 cm.Also, the box is made of a 1.5 cm thick wood, so the inner dimensions of the box will be (2×1.5=3)cm less.i.e., the inner dimensions of the box are 45 cm×33 cm×27 cm Volume of the box=45×33×27=40095 cm3Also, the dimensions of a brick are 6 cm×3 cm×0.75 cm.Volume of a brick=6×3×0.75=13.5 cm3 The number of bricks that can be put in the box=4009513.5=2970

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