Question

The difference between the outer and inner surfaces of a hollow cylinder is 484 cm². If the cylinder is 11 cm long while the sum of the radii is 21 cm, find the TSA & Volume of the matter contained by the cylinder.

Answer 1

• Height = 11 cm
• Outer Radius = R
• Inner Radius = r

• 2πRh - 2πrh = 484
• 2πh(R - r) = 484
• 22/7 * 11(R - r) = 242

• R - r = 7
• R + r = 21

• R = 14 & r = 7

TSA

• 2π(R-r)h + 2π(R-r)²
• 2π(R-r) [ h + (R-r) ]
• 2*22/7 * 7 [11 + 7]
• 44 * 18
• 792 cm²

VOLUME

• π (R - r)² h
• 22/7 * 7² * 11
• 22 * 7 * 11
• 1694 cm³

Answer 2

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Heat is the form of energy that is transferred between systems or objects with different temperatures (flowing from the high-temperature system to the low-temperature system). Also referred to as heat energy or thermal energy.