In each example given below, the radius of the base of a cylinder and its height are given. Then find the curved surface area and total surface area.

(1) r = 7 cm, h = 10 cm

(2) r = 1.4 cm, h = 2.1 cm

(3) r = 2.5 cm, h = 7 cm

(4) r = 70 cm, h = 1.4 cm

(5) r = 4.2 cm, h = 14 cm

Curved surface area of cylinder(CSA) = 2πrh

Total surface area of cylinder(TSA) = 2πr(h+r)

1. r = 7 cm, h = 10 cm

CSA = 2πrh

= 2 × 3.14 × 7 × 10

= 440 cm²

TSA = 2πr(h+r)

= 2 × 3.14 × 7(10+7)

= 748 cm²

2. r = 1.4 cm, h = 2.1 cm

CSA = 2πrh

= 2 × 3.14 × 1.4 × 2.1

= 18.48 cm²

TSA = 2πr(h+r)

= 2 × 3.14 × 1.4(2.1+1.4)

= 30.8 cm²

3. r = 2.5 cm, h = 7 cm

CSA = 2πrh

= 2 × 3.14 × 2.5 × 7

= 110 cm²

TSA = 2πr(h+r)

= 2 × 3.14 × 2.5(7+2.5)

= 149.29 cm²

4. r = 70 cm, h = 1.4 cm

CSA = 2πrh

= 2 × 3.14 × 70 × 1.4

= 616 cm²

TSA = 2πr(h+r)

= 2 × 3.14 × 70(70+1.4)

= 31416 cm²

5. r = 4.2 cm, h = 14 cm

CSA = 2πrh

= 2 × 3.14 × 4.2 × 14

= 369.6 cm²

TSA = 2πr(h+r)

= 2 × 3.14 × 4.2(4.2+14)

= 480.48 cm²