Question : The radius of a circle is 1.75 cm. What is the circumference of the circle? (Take $\pi=\frac{22}{7}$)
Option 1: 5.5 cm
Option 2: 11 cm
Option 3: 9.63 cm
Option 4: 22 cm
Correct Answer: 11 cm
Solution : Given: The radius of a circle = 1.75 cm Circumference of the circle = $2\pi r=2\times\frac{22}{7}\times 1.75=44 × 0.25=11\ \text{cm}$ Hence, the correct answer is 11 cm.
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Question : The area of a circle is 1386 cm2. What is the radius of the circle? [Use $\pi= \frac{22}{7}$]
Option 1: 7 cm
Option 2: 14 cm
Option 3: 18 cm
Option 4: 21 cm
Question : If the perimeter of the circle is 13.2 cm, then the radius of the circle is___________. $\left(\right.$ Take $\left.\pi=\frac{22}{7}\right)$
Option 1: 6.6 cm
Option 2: 4.2 cm
Option 3: 2.1 cm
Option 4: 3.3 cm
Question : The circumference of a circle exceeds its diameter by 60 cm. The area of the circle is: (Take $\pi=\frac{22}{7}$ )
Option 1: 1078 cm2
Option 2: 616 cm2
Option 3: 536 cm2
Option 4: 346.5 cm2
Question : A sector of a circle has a central angle of 45° and an arc length of 22 cm. Find the radius of the circle. ( Use $\pi=\frac{22}{7}$)
Option 1: 32 cm
Option 2: 35 cm
Option 3: 28 cm
Option 4: 36 cm
Question : In a circle of radius 42 cm, an arc subtends an angle of 60° at the centre. Find the length of the arc. $\left(\right.$ Take $\left.\pi=\frac{22}{7}\right)$
Option 1: 44 cm
Option 2: 21 cm
Option 3: 22 cm
Option 4: 42 cm
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