It’s 7 bc diameter is just circumference/pi
Answer:
The outering is 11 cm so let's see what the Area is. We use the formula Area of a circle:
A = πr² = πd2/4
If:
Radius, r = 11 cm
Then:
Diameter, d = 22 cm
Circumference, C = 69.115038378975 cm
Area, A = 380.13271108436 cm²
now all we need to do is subtracts the inner circle Area.
If:
Radius, r = 9 cm
Then:
Diameter, d = 18 cm
Circumference, C = 56.548667764616 cm
Area, A = 254.46900494077 cm²
Thus: 380.13271108436 cm² - 254.46900494077 cm² =
125.6637061436 cm²
Step-by-step explanation:
Answer:
-6m+2
Step-by-step explanation:
-6m+3-1
=-6m+2
Hope this helps
Answer:
Mass= 1.479 KG
Step-by-step explanation:
Density of the cuboid
Length= 10 cm
Width= 5 cm
Height=3 cm
Volume of the Cuboid is:
Length*Width*Height
Volume:
Mass=1479 grams
Or, Mass=1479/1000= 1.479 KG