Please give me answer and step by step explain
Answers
Answer:
Your answer is here:-
Step-by-step explanation:
11.
Circumference= 44cm
Circumference of circle = 2πr
44 = 2x 22/7 x r
(44x7)/(2x22) = r
7cm = r
Radius is 7cm.
12. Circumference = 154cm
Circumference of circle = 2πr
154 = 2x22/7x r
154x7/2x22 = r
49/2. = r
24.5 = r
24.5 cm is the radius.
13. Radius of circular sheet = 16cm
area of circle = πr²
= 22/7x16²
= 804.57cm²
area of the circle cutted = (22/7) x7 x7
= 154cm²
area of rectangle = lxb
= 3x2
= 6cm²
area of remaining sheet = 804.57 - ( 154+6)
= 804.57 - 160
= 644.57 cm²
14. area of circular garden = πr²
= (22/7)x 49x49
= 7546cm²
area of full area = πr²
= (22/7)x 56x56
= 9856cm²
area of footpath = 9856 - 7546
= 2310 cm²
Hope it helps you.