how many spheres 12cm in diameter can be made from a metallic cylinder of diameter 8cm and height 90cm.
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Answer:
volume of a metallic cylinder =⅓πr²h
=> ⅓×22/7 ×8/2×8/2×90
=>176×30/7
=>5280/7
=>754.28cm³
volume of a sphere = 4/3πr²
=>4/3×22/7×12/2×12/2
=>264/2
=>132cm³
Total Sirface area of a metallic cylinder=
2πr(r+h)
=>2×22/7(4+90)
=>44/7×94
=>2096/7
=>299.42cm²
Total Surface area of a sphere = 4πr
=>4×22/7×6
=>504/7
=>92cm²
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