A solid metallic cylinder of radius 12cm and height 175cm is melted and moulded into another solid cylinder of height 63cm. What is the radius of the new cyclinder ??
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Let the Radius of new cylinder = r1 and height = h1
Clearly, πr²h = πr1²h1
π12×12×175 = πr1² × 63
r1²= 12×12×175/63
r1² = 400
r1 = 20cm
Clearly, πr²h = πr1²h1
π12×12×175 = πr1² × 63
r1²= 12×12×175/63
r1² = 400
r1 = 20cm
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radius of new cylinder is 20 cm
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