Mensurationmedium · Past Paper
Find the volume of a hollow cylinder with external radius 5 cm, internal radius 4 cm, and height 10 cm.
A90π cm³
B10π cm³
C20π cm³
D45π cm³
✓ Correct Answer: A — 90π cm³
Volume = π(R² - r²)h = π(5² - 4²)10 = π(25 - 16)10 = 90π cm³.
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