Answer :

**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 cm^{2}

TSA = 2πr(h+r)

**=** 2 × 3.14 × 7(10+7)

**=** 748 cm^{2}

2. r = 1.4 cm, h = 2.1 cm

CSA = 2πrh

**=** 2 × 3.14 × 1.4 × 2.1

**=** 18.48 cm^{2}

TSA = 2πr(h+r)

**=** 2 × 3.14 × 1.4(2.1+1.4)

**=** 30.8 cm^{2}

3. r = 2.5 cm, h = 7 cm

CSA = 2πrh

**=** 2 × 3.14 × 2.5 × 7

**=** 110 cm^{2}

TSA = 2πr(h+r)

**=** 2 × 3.14 × 2.5(7+2.5)

**=** 149.29 cm^{2}

4. r = 70 cm, h = 1.4 cm

CSA = 2πrh

**=** 2 × 3.14 × 70 × 1.4

**=** 616 cm^{2}

TSA = 2πr(h+r)

**=** 2 × 3.14 × 70(70+1.4)

**=** 31416 cm^{2}

5. r = 4.2 cm, h = 14 cm

CSA = 2πrh

**=** 2 × 3.14 × 4.2 × 14

**=** 369.6 cm^{2}

TSA = 2πr(h+r)

**=** 2 × 3.14 × 4.2(4.2+14)

**=** 480.48 cm^{2}

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