a semi-circular sheet of metal of diameter 28cm is bent to form an open conical cup. Find the capacity of the cup.
Asked by Kaustav Sen | 12th Feb, 2011, 01:40: PM
Here is the solution:
When the semi-circular sheet is bent into an open conical cup, the radius of the sheet becomes slant height of the cup and circumference of the sheet becomes circumference of the base of the cup.
therefore, l = slant height of the cup = 14 cm.
Let r cm be the radius and h cm the height(depth) of the cup. Then,
circumference of the base of the cup = circumference of the sheet
Answered by | 13th Feb, 2011, 10:05: AM
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