Question

Diameter of circular field is 70 cm. The area of same circular feild will be​

Answer 1

Step-by-step explanation:

Question:-

Diameter of circular field is 70cm. Then find the area of same circular field.

Answer:-

Given:-

• The given figure is a circle.

• The diameter of the circle is 70cm.

To find:-

Area of the field

Process:-

As we all know that:-

$⇒ Area \: of \: circle = π {r}^{2}$

But we don't have the radius of the circle.

Let's get the radius of the circle:-

As we know:-

$⇒ Radius= \frac{Diameter}{2}$

Then,radius:-

$⇒r = \frac{70}{2} \\ \\ ⇒r = 35cm$

Therefore,getting the area of the circle:-

$⇒Area = π× (r)² \\ \\ ⇒Area = \frac{22}{7} \times 35×35 \\ \\ ⇒Area = 22 × 5 × 35 \\ \\ ⇒ Area = 3,850cm²$

Therefore,we can conclude that area of the circle is 3,850cm².

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★ More to know

Some more formulas:-

$• \: Area \: of \: circle \: = πr² \\ \\ • \: Circumference \: (perimeter) \: of \: circle = 2πr \\ \\ • \: Radius = \frac{Diameter}{2} \\ \\ • \: Diameter = Radius × 2 \\ \\ • \: Area \: of \: semicircle= \frac{1}{2} \pi {r}^{2} \\ \\ • \: Circumference \: of \: semicircle \: = \frac{1}{2} (\pi \: d) \\ \\ • \: Area \: of \: Quartercircle= \frac{1}{4} πr² \\ \\ • Circumference \: of \: quartercircle = \frac{1}{4} (\pi \: d)$

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Answer 2

Given :-

• Diameter of circular field = 70cm .

To Find :-

• Area of circular field ?

Solution :-

we know that,

• Radius = Diameter/2
• Area = π * (radius)²

so,

→ Radius od circular field = 70/2 = 35 cm.

then,

→ Area of circular field = (22/7) * 35 * 35 = 22 * 5 * 35 = 110 * 35 = 3850 cm². (Ans.)