Question

A. Find the density of the following.
1.) A cylinder of radius 7 cm, height 14 cm and weight 2 kg.​

Answer 1

Answer:

Let r and h be the radius and height of the solid right circular cylinder respectively

Given that r=7cm and h=20cm

Curved surface area, CSA=2πrh

=2×

7

22

×7×20

Thus,the curved surface area =880sq.cm

Now, the total surface area =πr[h+r]

=2×

7

22

×7×[20+7]=44×27

Thus, the total surface are =1188sq.cm

Answer 2

Answer:

1188 sq.cm

Explanation:

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