Mathematics · Mensuration
The external diameter of a conical coronet made of thermocol is 21 cm. To wrap its outer surface with foil, the total expenditure is ₹57.75 at the rate of 10 paise per cm². The height of the coronet is:
- 110 cm
- 27 cm
- 328 cm
- 414 cm✓
Correct answer
14 cm
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