Question

7. Find the length of the diameter of a circle whose circumference is 44 cm.
8. The circumference of a circle is 31.4 cm. Find the radius and the area of the circle
(Take it = 3.14)
9 Find the radius and the circumference of a circle whose area is 1447 cm.​

Answer 1

Step-by-step explanation:

7.Circumference=2πR

44=2×22/7×R

1=R/7

R=7

8.Circumference=2πR

31.4=2×3.14×R

10=2R

5=R

Area=πR²

=3.14×25

=78.5

Area=πR²

1447=3.14×R²

1447/3.14=R²

R=√460