Question

NOTE Use a
EXERCISE 20F
22
, unless stated otherwise.
7
-
1. Find the area of a circle whose radius is
(i) 21 cm,
(ii) 3.5 m.
2. Find the area of a circle whose diameter is
(i) 28 cm,
(ii) 1.4 m.
3. The circumference of a circle is 264 cm. Find its area.
4. The circumference of a circle is 35.2 m. Find its area.
5. The area of a circle is 616 cm2. Find its circumference.
6. The area of a circle is 1386 m2. Find its circumference.
7. The ratio of the radii of two circles is 4: 5. Find the ratio of their areas.
8. A horse is tied to a pole in a park with a string 21 m long. Find the area over which the horse
can graze.
9. A steel wire when bent in the form of a square encloses an area of 121 cm2. The same wire
is bent in the form of a circle. Find the area of the circle.​

Answer 1

Answer:

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