[[1]] planks of size 2 m × 25 cm × 8 cm can be prepared from a wooden block 5 m long, 70 cm broad and 32 cm thick, assuming that there is no wastage.

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Detailed Solution

Concept- 28 planks of size 2 m × 25 cm × 8 cm can be prepared from a wooden block 5 m long, 70 cm broad and 32 cm thick, assuming that there is no wastage.
Find the volume of the wooden block by first calculating the volume of one plank using the cuboid formula. The volume is unchanged, just like when shapes are converted. To get the number of planks, divide the wooden block's volume by the volume of a single plank.
Volume of box

Volume of wood

(courting all to is)
Number of planks

Number of planks that can be prepared from the wooden block is 28 .
Hence, the correct answer is 28.

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