What is the mass of metal radius 3.0 cm if its density is 7.0 g/ cm cube ? Express your answer in kg toooooooooo
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mass =volume×density
m=4/3×π×r³×7
m=4/3×22/7×3×3×3×7=4×22×9
m=792gm=792/1000gm=0.792kg
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