# Circumference and Area of a Circle Online Quiz

Following quiz provides Multiple Choice Questions (MCQs) related to **Circumference and Area of a Circle**. You will have to read all the given answers and click over the correct answer. If you are not sure about the answer then you can check the answer using **Show Answer** button. You can use **Next Quiz** button to check new set of questions in the quiz.

**Q 1 - Find the area and circumference of following circle. Use π = 3.14**

### Answer : A

### Explanation

**Step 1:**

Given diameter = 20 ; radius r = 20/2 = 10 units

**Step 2:**

Circumference of Circle, C = 2πr = 2(3.14)10 = 62.8 units

**Step 3:**

Area of Circle, A = πr^{2} = (3.14)(10)(10) = 314 square units

**Q 2 - Find the area and circumference of following circle. Use π = 3.14**

### Answer : C

### Explanation

**Step 1:**

Given radius r = 9.5 units

**Step 2:**

Circumference of Circle, C = 2πr = 2(3.14)9.5 = 59.66 units

**Step 3:**

Area of Circle, A = πr^{2} = (3.14)(9.5)(9.5) = 283.39 square units

**Q 3 - Find the area and circumference of following circle. Use π = 3.14**

### Answer : D

### Explanation

**Step 1:**

Given diameter = 21 ; radius r = 21/2 = 10.5 units

**Step 2:**

Circumference of Circle, C = 2πr = 2(3.14)10.5 = 65.94 units

**Step 3:**

Area of Circle, A = πr^{2} = (3.14)(10.5)(10.5) = 346.19 square units

**Q 4 - Find the area and circumference of following circle. Use π = 3.14**

### Answer : B

### Explanation

**Step 1:**

Given radius r = 5.5 units

**Step 2:**

Circumference of Circle, C = 2πr = 2(3.14)5.5 = 34.54 units

**Step 3:**

Area of Circle, A = πr^{2} = (3.14)(5.5)(5.5) = 94.99 square units

**Q 5 - Find the area and circumference of following circle. Use π = 3.14**

### Answer : A

### Explanation

**Step 1:**

Given diameter = 10 ; radius r = 10/2 = 5 units

**Step 2:**

Circumference of Circle, C = 2πr = 2(3.14)5 = 31.4 units

**Step 3:**

Area of Circle, A = πr^{2} = (3.14)(5)(5) = 78.5 square units

**Q 6 - Find the area and circumference of following circle. Use π = 3.14**

### Answer : C

### Explanation

**Step 1:**

Given radius r = 12.5 units

**Step 2:**

Circumference of Circle, C = 2πr = 2(3.14)12.5 = 78.5 units

**Step 3:**

Area of Circle, A = πr^{2} = (3.14)(12.5)(12.5) = 490.63 square units

**Q 7 - Find the area and circumference of following circle. Use π = 3.14**

### Answer : B

### Explanation

**Step 1:**

Given diameter = 4 ; radius r = 4/2 = 2 units

**Step 2:**

Circumference of Circle, C = 2πr = 2(3.14)2 = 12.56 units

**Step 3:**

Area of Circle, A = πr^{2} = (3.14)(2)(2) = 12.56 square units

**Q 8 - Find the area and circumference of following circle. Use π = 3.14**

### Answer : D

### Explanation

**Step 1:**

Given diameter = 14 ; radius r = 14/2 = 7 units

**Step 2:**

Circumference of Circle, C = 2πr = 2(3.14)7 = 43.96 units

**Step 3:**

Area of Circle, A = πr^{2} = (3.14)(7)(7)= 153.86 square units

**Q 9 - Find the area and circumference of following circle. Use π = 3.14**

### Answer : A

### Explanation

**Step 1:**

Given diameter = 18 ; radius r = 18/2 = 9 units

**Step 2:**

Circumference of Circle, C = 2πr = 2(3.14)9 = 56.52 units

**Step 3:**

Area of Circle, A = πr^{2} = (3.14)(9)(9) = 254.34 square units

**Q 10 - Find the area and circumference of following circle. Use π = 3.14**

### Answer : C

### Explanation

**Step 1:**

Given diameter = 9 ; radius r = 9/2 = 4.5 units

**Step 2:**

Circumference of Circle, C = 2πr = 2(3.14)4.5 = 28.26 units

**Step 3:**

Area of Circle, A = πr^{2} = (3.14)(4.5)(4.5) = 63.59 square units