Question

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

Answer 1

Answer:

Given: Radius=7cm,

Height=10cm

Total surface area=2πr(h+r)sq.units

=2×

7

22

×7(10+7)

=44×17=748sq.cm

Answer 2

Answer:

Hey mate,

Here u go↓↓

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

22×7×20Thus,the curved surface area =880sq.cm

22×7×20Thus,the curved surface area =880sq.cmNow, the total surface area =πr[h+r]

=πr[h+r]

=>2×7÷22×7×[20+7]=44×27

22×7×[20+7]=44×27Thus, the total surface are =1188sq.cm