Question

The diameter of the base of a right circular culinder is 10cm and its height is 21cm.find the area of the curved surface and volume of the cylinder

Answer 1

Answer:

21*10=210

Step-by-step explanation:

Answer 2

Answer:

❥ Diameter of the base of a right circular cylinder is 10 cm

❥ Radius of the base of a right circular cylinder (r) is 5 cm

• $\frac{ d}{2 }$ = $\frac{10}{2}$ = 5

❥ Height of a right circular cylinder is 21 cm

Step-by-step explanation:

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

• 2 × $\frac{22}{7}$ × 5 × 21
• 660 cm²

(ii) Total surface area of a right circular cylinder = 2πr (r + h)

• 2 × $\frac{22}{7}$ × 5 (5 + 21)

• 2 × $\frac{22}{7}$ × 5 × 26

• 817.14 cm² approximately

(iii) Volume of a right circular cylinder = πr²h

• $\frac{22}{7}$ × 5 × 5 × 21
• 1,650 cm³