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Title: Area of a circle

Grade: 8-a Lesson: S4-L4

Explanation: Let us verify the answer here with the steps.

Description:

Step	Type	Explanation	Answer
1	Problem	A tin of paint has a diameter of 9.5 cm. What is the area of the top of the tin?(Use π = 3.14)
2	Hint	Formula used	\$"Area(A)" = \pi \times r^2\$ \$"Radius(r)" = "diameter(d)" / 2\$
3	Step	Given that, Diameter of the tin =	9.5 cm
4	Step	Radius of top of tin	= \$((9.5)/2)cm\$ =4.75cm
5	Step	Area of the tin =	\$\pi \times r^2\$ ⇒ \$3.14 \times 4.75 \times 4.75\$ ⇒ 70.84
6	Step	Hence, the area of the tin is	70.84 cm

Step

Type

Explanation

Answer

Problem

A tin of paint has a diameter of 9.5 cm. What is the area of the top of the tin?(Use π = 3.14)

Hint

Formula used

\$"Area(A)" = \pi \times r^2\$

\$"Radius(r)" = "diameter(d)" / 2\$

Step

Given that,

Diameter of the tin =

9.5 cm

Step

Radius of top of tin

= \$((9.5)/2)cm\$

=4.75cm

Step

Area of the tin =

\$\pi \times r^2\$

⇒ \$3.14 \times 4.75 \times 4.75\$

⇒ 70.84

Step

Hence, the area of the tin is

70.84 cm