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How many planks of size can be prepared from a wooden block 5m long, 70m broad and 32cm thick, assuming that there is no wastage?

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answer is B.

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Detailed Solution

Volume of a cuboid having length ‘l’, breadth ‘b’ and height ‘h’ is

cubic units.
Thus,

Volume of box:

Volume of wood:

No. of plants that can be prepared from the wooden block is 28.

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