Parimal decides to make twenty conical birthday caps from waxed colour papers for his
younger brother's birthday party. He wants to keep the slanting height and the base diameter
of each of the caps as 10 cm and 16 cm respectively. If each colour paper measures 1256
cm square, find the number of sheets Parimal has to buy for the purpose. (Take A = 3.14]
dia
er of the base and the total
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