Question 1 (b)

Find the circumference of the circle with the following radius: $(T a k e π = \frac{22}{7})$
28 mm

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Solution

Given: Radius of the circle = 28 mm
Circumference of the circle = $2 π r$
$= 2 \times \frac{22}{7} \times 28 = 176 m m$

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Question 1 (c)

Find the circumference of the circle with the following radius: $(T a k e π = \frac{22}{7})$
21 cm

π = \frac{22}{7}

28 m m

Find the circumference of the circles with the following radius: (Takeπ)

(a) 14 cm (b) 28 mm (c) 21 cm

Question 3
If the circumference of a circular sheet is 154 m, find its radius. Also, find the area of the sheet. $(T a k e π = \frac{22}{7})$

Question 2 (b)

Find the area of the following circle, given that: $(T a k e π = \frac{22}{7})$
diameter = 49 m

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