Chapter 7) The Circumfernce And The Area Of A Circle

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Q1. The ratio of the circumference and diameter of a circle is constant and this constant is called as ................ number ?

A) rational
B) irrational
C) natural
D) whole

Q2. If the radius of a circle is 7 cm, then ist circumference is ................ cm?

A) 22
B) 21
C) 12 cm
D) 14 cm

Q3. If the radius of a circle is 21 cm then its area is ................

A) 1300 sq cm
B) 1386 sq cm
C) 616 sq cm
D) 216 sq cm

Q4. The area of the circle is 5544 sq cm then find its radius.

A) 24 cm
B) 42 cm
C) 21 cm
D) 22 cm

Q5. If the area of a circle is 3850 sq m, then its diameter will be ............ .

A) 49 cm
B) 35 cm
C) 70 cm
D) 70 m

Q6. What is the the circumference of a circle with diameter 14 cm?

A) 18 cm
B) 22 cm
C) 44 cm
D) 35 cm

Q7. What is the area of the circle with radius 28 cm?

A) 2464 sq cm
B) 2254 sq cm
C) 1464 sq cm
D) 64 sq cm

Q8. If the circle has its radius 35 cm then its circumference will be ............ cm

A) 110 cm
B) 210 cm
C) 22 cm
D) 220 cm

Q9. If the diameter of a circle is 28 cm, then its area will be .............. sq cm

A) 116
B) 216
C) 616
D) 336

Q10. If the diameter of a circle is 70 cm, then its circumference will be .............. cm?

A) 220
B) 440
C) 320
D) 630