50+ Area and Circumference of a Circle worksheets for 5th Year on ... - Free Printable

Let’s solve each problem step by step.

We use the formula for circumference of a circle:

Circumference = 2 × π × radius
or if you’re given diameter:
Circumference = π × diameter

We’ll use π ≈ 3.14 unless told otherwise.

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Problem 1:
Radius = 7 cm
Circumference = 2 × 3.14 × 7
= 6.28 × 7
= 43.96 cm → matches option B

✔ Check: 2 × 3.14 = 6.28; 6.28 × 7 = 43.96 — correct.

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Problem 2:
Radius = 17 cm
Circumference = 2 × 3.14 × 17
= 6.28 × 17

Let’s compute that:

6 × 17 = 102
0.28 × 17 = 4.76
Total = 102 + 4.76 = 106.76 cm → matches option B

✔ Check: 6.28 × 17 = (6 × 17) + (0.28 × 17) = 102 + 4.76 = 106.76 — correct.

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Problem 3:
Diameter = 2 m → so radius = 1 m, but we can also use C = π × diameter
Circumference = 3.14 × 2 = 6.28 m

Wait — look at the options:

A) 6.28 cm
B) 628 cm

The unit in the diagram is meters, not centimeters.

But both answer choices are in cm. That means we need to convert meters to centimeters.

2 m = 200 cm → so diameter = 200 cm
Then Circumference = π × diameter = 3.14 × 200 = 628 cm → matches option B

⚠️ Important: The diagram says “2 m”, but answers are in cm. So we must convert.

If we mistakenly used 2 cm, we’d get 6.28 cm — which is wrong because the original measurement was in meters.

So correct answer is B) 628 cm

✔ Check: 2 m = 200 cm; 3.14 × 200 = 628 — yes.

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Problem 4:
Radius = 3 m
Circumference = 2 × 3.14 × 3 = 6.28 × 3 = 18.84 m

But wait — there are no answer choices shown for problem 4 in your image? Let me check again.

Looking back at your upload: Problem 4 has a circle with radius 3 m, and then it cuts off — no options A/B listed below it like the others.

That might be an error in the worksheet or cropping. But since the instruction says “solve the problem accurately”, and only problems 1–3 have visible multiple choice options, perhaps problem 4 is incomplete?

However, let’s assume we’re to calculate it anyway.

Circumference = 2 × π × r = 2 × 3.14 × 3 = 18.84 m

But since no options are given, and the user didn’t ask us to generate practice or teach topic, and ExplainAnswer is false — we should only provide final answers for the ones with clear options.

Wait — re-reading the user input: They uploaded an image with 4 problems, but only first 3 have answer choices visible. Problem 4 is cut off.

Since the task is to “solve the problem accurately” and the format requires Final Answer section, and only problems 1–3 have selectable options, I will give answers for 1–3.

But note: In problem 3, even though the diagram says “2 m”, the answer choices are in cm — so we converted correctly to 628 cm.

Now, compiling final answers:

Final Answer:
1. B
2. B
3. B