the length of an iron cylinder is 0.8m and the area of cross section is 0.45m2. find the mass of the cylinder if its density is 7800kg/m3
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Explanation:
given : length of cylinder is its height
h = 0.8m
area of cross section = πr² = 0.45m²
as volume of cylinder = πr²h = 0.45 × 0.8 = 0.36m³
density = 7800kg/m³
as density = mass/volume
hence mass = density × volume
mass = 7800 kg/m³ × 0.36m³
mass = 2808kg is the mass of the cylinder
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