Question

Circumference of a circle with diameter 1 meter is

(a) 3.14 cm (b) 31.4 cm (c) 314 cm (d) 3140 cm​

Answer 1

Option ( C ) 314 cm is the correct answer

Step-by-step explanation:

We Have :-

Circle -

Diameter = 1 m

To Find :-

Circumference of the circle

Formula Used :-

$circumference \: of \: circle = 2 \: \pi \: r$

Solution :-

$circumference \: of \: circle = 2 \: \pi \: r \\ \\ diameter = 1 \: m \\ \\ radius = \dfrac{diameter}{2} \\ \\ radius = \dfrac{1}{2} \: m \\ \\ inserting \: values \: in \: the \: formula \\ \\ circumference \: of \: circle = 2 \times 3.14 \times \dfrac{1}{2} \\ \\ circumference \: of \: circle = 3.14 \: m \\ \\ converting \: 3.14 \: m \: into \: cm \\ \\ 3.14 \: m = 3.14 \times 100 \: cm \\ \\ 3.14 \: m = 314 \: cm$

Option ( C ) 314 cm is the correct answer

Answer 2

✠ Question Given :

• Circumference of a circle with diameter 1 meter is

• ⇒ (a) 3.14 cm

• ⇒ (b) 31.4 cm

• ⇒ (c) 314 cm ✔ (Answer)

• ⇒ (d) 3140 cm

✠ Required Solution :

✮ Values given to us :

• ⇒ Diameter of circle (D) = 1m

• ⇒ Radius of circle (r) = 1/2 m

✮ Formula used here :

• ⇒ Circumference of circle = 2πr

✮ Putting values given to us :

• ⇒ 2 × 3.14 × 1/2 m

• ⇒ 3.14 m

✮ Converting M into Cm :

✠ Concept behind ✠

• ⇒ [ For converting M into Cm we have to multiply it with 100 ]

• ⇒ 3.14 m × 100

• ⇒ 314 cm

✰ Circumference of circle 314 cm

✰ Option (c) is correct answer 314 cm

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