Question

9. A school organized a competition of making and decorating pen holders in the shape of a cylindex by
making its base and its curved surface area with cardboard. Each pen holder is supposed to have a radius
of 3.5 cm and height 10 cm. How much cardboard does the school need if 30 students are participating
bottom 01
my
cm lone The inner diameter of a cross-section is 4 cm and the outer diameter​

Answer 1

Answer:

2πrh is the formula

2*22/7*3.5*10

=220 cm of cardboard is required for one student

for 30student

it will be 6600cm or 66m

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