Question

The diameter of the base of a right circular cylinder is 28cm and it heighr is 21cm . Find its curved surface area

Answer 1

Step-by-step explanation:

diameter=28 cm

radius=14 cm

height=21 cm

area=2πrh

=2×22/7×14×21

=42×44

=1848 cm^2

Answer 2

Answer:

❥ Diameter of the base of a right circular cylinder (d) = 28 cm

❥ Height of the base of a right circular cylinder (h) = 21 cm

❥ Radius of the base of a right circular cylinder (d) = $\frac{ d }{ 2 }$ = $\frac{ 28 }{ 2 }$ = 14 cm

Step-by-step explanation:

Curved surface area of a right circular cylinder (CSA) = 2πrh

• 2 × $\frac{ 22 }{ 7 }$ × 14 × 21
• 2 × 22 × 2 × 21
• 1,848 cm²

Therefore, the curved surface area of a right circular cylinder is 1,848 cm²