Circumference of whole circle =

360÷20=18

hence length of arc = 1/3 pi
Answer:
1 : 15
Step-by-step explanation:
1,5 l of water = 1500 ml water
poison : water = 100 : 1500 = 1 : 15
Answer: 1 : 15
Combine like terms: (9x-6)+(8x+9)
9x+8x=17x
-6+9=3
(9x-6)+(8x+9)=17x+3
Answer: The mean absolute devastation is 3
Step-by-step explanation:
The length of the rectangle is 30 m
The width of the rectangle is 20 m
The sidewalk is 3m wide on all sides, so
length of sidewalk = 30+6 =36 m
Width of sidewalk = 20+6 = 26 m
Area of rectangle = 
Area of rectangle =
Area of rectangle including sidewalk = 
Hence, area of sidewalk alone = area of rectangle with sidewalk - area of rectangle
Surface Area =
m²