Q. Some poor children use recycled paper to make - conical party caps with radius 7 cm and slant height 15 cm and sell it on a street stall.
(a) How much would they earn profit on selling 50 caps? The selling price of cap is 50 paise per c m 2 , while it costs Rs. 10 per 100  c m 2 ?
(b) Which value is depicted by the children?
 

Kindly refer the same  link for your query.
https://www.meritnation.com/ask-answer/question/some-poor-childern-use-recycled-paper-to-make-conical-par/surface-areas-and-volumes/12301417 
Value depicted:
We can save trees and our environment by using recycled object.
Regards

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