Question

find the curved surface area and the total surface area of the cylinder for which h=35 cmand r=21cm​

Answer 1

Answer:

given

h=35cm

r=25cm are the height and radius of cylinder

CSA of cylinder=2πrh

2*22\7*25*35

2*22\7*875

2*22*125

44*125

5500cm²

TSA of cylinder=2πr(r+h)

2*22\7(25+35)

2*22\7(60)

120*22\7

2640\7

377.14 cm²

Answer 2

Answer:

CSA = 4,620 cm²

TSA = 7,392 cm²

Step-by-step explanation:

Height of the cylinder,h = 35cm

Radius of base of the cylinder,r = 21cm

i) CSA=2πrh

          =2×$\frac{22}{7}$×21×35

          = 4,620 cm²

ii) TSA=2πr(h+r)

          = 2×$\frac{22}{7}$×21(35+21)

          = 7,392 cm²