Mensurationmedium · Past Paper
The curved surface area of a right circular cone is 12320 sq. cm. If the radius of its base is 56 cm, find its slant height.
A70 cm
B80 cm
C60 cm
D100 cm
✓ Correct Answer: A — 70 cm
CSA = πrl. 12320 = (22/7) * 56 * l. 12320 = 176 * l. l = 12320 / 176 = 70 cm.
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