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Question

How many spherical bullets each of 5 cm in diameter can be cast from a rectangular block of metal 11 dm × 1 m×5 dm?


Solution

Volume of the block =lbh=11 dm×1 m×5 dm=110 cm×100 cm×50 cm=550000 cm3
Volume of each bullet =4π3r3=4π3×(52)3=65.4 cm3
So, number of bullets =550000 cm365.4 cm3=8409

Mathematics
RD Sharma
Standard X

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