Question

Diameter of a circular garden is 9.8cm.Which of the following is its area?

(A)75.46cm2 (B) 76.46 cm 2

(C) 74.4cm2
(D) 76.4cm2

pls pls ans​

Answer 1

Answer:

$diameter = 9.8cm \\ \\ radius = diameter - \sqrt{2} \\ 9.8 \div 2 \\ \\ 98 \sqrt{20} \\ \\ \\ = 49. \sqrt{10} m$

Answer 2

$\huge{\mathfrak{\purple{\underline{\underline{\orange{QUESTION:-}}}}}}$

Diameter of a circular garden is 9.8m .Which of the following is its area?

1️⃣ 75.46m²

2️⃣ 76.46m²

3️⃣ 74.4m²

4️⃣ 76.4m²

$\huge{\mathfrak{\red{\underline{\underline{\green{TO\: FIND:-}}}}}}$

Area of the garden .

$\huge{\mathfrak{\blue{\underline{\underline{\pink{SOLUTION:-}}}}}}$

Diameter of circular garden = 9.8m

Radius of circular garden = $\large\frac{9.8m}{2}$ = 4.9m

$\large{\mathtt{\boxed{\color{aqua}{Area\:=\:πr²}}}}$

Here,

• π = $\frac{22}{7}$
• r = Radius of garden

Substituting the value in the above formula, we get

$\mapsto{\bold{Area\:=\: \frac{22}{7} \times 4.9 \times 4.9}}$

$\mapsto{\bold{Area\:=\: \frac{22}{\cancel{7}} \times {\cancel{4.9}} \times 4.9}}$

$\mapsto{\bold{Area\:=\: 22 \times 0.7 \times 4.9} }$

$\large{\boxed{\mathtt{\color{coral}{Area\:of\:garden\:=\:75.46m²}}}}$

∴ Option (A) is correct .