the students of school decided to make and sell 2 box cylindrical pen holders of radius 3.5 cm and height 10 cm and donates collectes amount to prime minister relief fund for helping people of uttarakhand. the school supported action of students by supplying cardboards for making pen holders.
a) How many cardboards are required?
b) What value is depicted in th work
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a -cardboard required=2πr(h+r)=. 2*22*13.5=594sqcm
b-Help
b-Help
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