Question

A torch light illuminates the wall in the shape of a circle of diameter 26 cm. Find the area of the wall illuminated correct to two decimal places

Answer 1

The area of the wall illuminated is 530.66 square centimeter

Solution:

A torch light illuminates the wall in the shape of a circle of diameter 26 cm

Diameter = 26 cm

$Radius = \frac{diameter}{2}\\\\Radius = \frac{26}{2} = 13\ cm$

Find the area of the wall illuminated:

$Area\ of\ circle = \pi r^2$

Where, "r" is the radius

Substitute, r = 13 cm in above formula

$Area = 3.14 \times 13^2\\\\Area = 3.14 \times 169\\\\Area = 530.66$

Thus area of the wall illuminated is 530.66 square centimeter

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The area of circle is 2464 square meters. What will its circumference be?

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Answer 2

Answer:

The area of the wall illuminated is 530.66 square centimeter

Solution:

A torch light illuminates the wall in the shape of a circle of diameter 26 cm

Diameter = 26 cm

\begin{gathered}Radius = \frac{diameter}{2}\\\\Radius = \frac{26}{2} = 13\ cm\end{gathered}

Radius=

2

diameter

Radius=

2

26

=13 cm

Find the area of the wall illuminated:

Area\ of\ circle = \pi r^2Area of circle=πr

2

Where, "r" is the radius

Substitute, r = 13 cm in above formula

\begin{gathered}Area = 3.14 \times 13^2\\\\Area = 3.14 \times 169\\\\Area = 530.66\end{gathered}

Area=3.14×13

2

Area=3.14×169

Area=530.66

Thus area of the wall illuminated is 530.66 square centimeter

Learn more about this topic

The area of circle is 2464 square meters. What will its circumference be?

https://brainly.in/question/4561312

Find the area of a circle whose circumference is 22cm

Step-by-step explanation:

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