# Annulus

The radius of the larger circle is 8cm, the radius of smaller is 5cm. Calculate the contents of the annulus.

Result

S =  122.522 cm2

#### Solution:

Leave us a comment of example and its solution (i.e. if it is still somewhat unclear...):

Be the first to comment!

## Next similar examples:

1. 22/7 circle
Calculate approximately area of a circle with radius 20 cm. When calculating π use 22/7.
2. Circle - easy 2
The circle has a radius 6 cm. Calculate:
3. Two circles
Two circles with a radius 4 cm and 3 cm have a center distance 0.5cm. How many common points have these circles?
4. Bicycle wheel
After driving 157 m bicycle wheel rotates 100 times. What is the radius of the wheel in cm?
5. Cable
Cable consists of 8 strands, each strand consists of 12 wires with diameter d = 0.5 mm. Calculate the cross-section of the cable.
6. Diameter to area
Find the area of a circle whose diameter is 26cm.
7. Sidewalk
The city park is a circular bed of flowers with a diameter of 8 meters, around it the whole length is 1 meter wide sidewalk . What is the sidewalk area?
8. Circle - simple
The circumference of a circle is 930 mm. How long in mm is its diameter?
9. Clock hands
The second hand has a length of 1.5 cm. How long does the endpoint of this hand travel in one day?
10. Acreage
Plot has a diamond shape, its side is 25.6 m long and the distance of the opposite sides is 22.2 meters. Calculate its acreage.
11. Hotel
The hotel has a p floors each floor has i rooms from which the third are single and the others are double. Represents the number of beds in hotel.
12. Round it
0.728 round to units, tenths, hundredths.
13. Simple equation
Solve the following simple equation: 2. (4x + 3) = 2-5. (1-x)
14. Cupcakes 2
Susi has 25 cupcakes. She gives 4/5. How much does she have left?
15. Write 2
Write 791 thousandths as fraction in expanded form.
16. Withdrawal
If I withdrew 2/5 of my total savings and spent 7/10 of that amount. What fraction do I have in left in my savings?
17. Teacher
Teacher Rem bought 360 pieces of cupcakes for the outreach program of their school. 5/9 of the cupcakes were chocolate flavor and 1/4 wete pandan flavor and the rest were vanilla flavor. How much more chocolate flavor cupcakes than vanilla flavor?