Question

1. Find the area and perimeter of a circle when its
(i) radius = 3.5 cm (ii) diameter = 14 cm.
2. Ji) The perimeter of a circular region is 110 m. Find its area.​

Answer 1

Answer:

1 i 38.5 area=pie radius * radius =22/7*35/10*35*10=38.5

Answer 2

Answer:

1.(i) 38.5 sq. cm

(ii) 154 sq. cm

2.(i) 962.5 sq. m

Step-by-step explanation:

1. (i) area = 22/7 × 3.5 × 3.5

= 38.5 sq. cm

(ii) d = 14 cm

r = d/2 = 14/2 = 7cm

area = 22/7× 7×7

= 154 sq. cm

2.(i) perimeter of circle = 110 cm

2×22/7× r = 110

r = 110×7/22×1/2

r = 35/2 = 17. 5 m

area = 22/7 ×17.5 ×17.5

= 962.5 sq. m