# Four circles

1) Calculate the circle radius if its area is 400 cm square

2) Calculate the radius of the circle whose circumference is 400 cm.

3) Calculate circle circumference if its area is 400 cm square

4) Calculate the circle's area if perimeter 400 cm.

2) Calculate the radius of the circle whose circumference is 400 cm.

3) Calculate circle circumference if its area is 400 cm square

4) Calculate the circle's area if perimeter 400 cm.

**Result****Leave us a comment of this math problem and its solution (i.e. if it is still somewhat unclear...):**

**Showing 0 comments:**

**Be the first to comment!**

#### Following knowledge from mathematics are needed to solve this word math problem:

## Next similar math problems:

- Circle r,D

Calculate the diameter and radius of the circle if it has length 52.45 cm. - Area to perimeter

Calculate circle circumference if its area is 254.34cm2 - 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. - Circle - simple

Calculate the area of a circle in dm^{2}, if its circumference is 31.4 cm. - Perimeter to area

Calculate the area of a circle with the perimeter 15 meters. - Pipe cross section

The pipe has an outside diameter 1100 mm and the pipe wall is 100 mm thick. Calculate the cross section of this pipe. - Rhombus 4

Circumference of the rhombus is 44 cm, its height is 89 mm long. Calculate its content area. - Radius

Determine the radius of the circle, if its perimeter and area is the same number. - Right triangle ABC

Calculate the perimeter and area of a right triangle ABC, if you know the length of legs 4 cm 5.5 cm and 6.8 cm is hypotenuse. - Circle

What is the radius of the circle whose perimeter is 6 cm? - Diameter

What is the inside diameter of the cylinder container and if half a liter of water reaches a height 15 cm? - Lawns

Before a sports hall are two equally large rectangular lawns, each measuring 40 m and 12 m. Maintenance of 10m² lawn cost 45 CZK yearly. On each lawn is circular flowerbed with a diameter 8 meters. How much money is needed each year to take on lawn care?. - Mine

Wheel in traction tower has a diameter 4 m. How many meters will perform an elevator cabin if wheel rotates in the same direction 89 times? - Flowerbed

In the park there is a large circular flowerbed with a diameter of 12 m. Jakub circulated him ten times and the smaller Vojtoseven times. How many meters each went by and how many meters did Jakub run more than Vojta? - Well

Rope with a bucket is fixed on the shaft with the wheel. The shaft has a diameter 50 cm. How many meters will drop bucket when the wheels turn 15 times? - Cross five

The figure on the picture is composed of the same squares and has a content of 45cm². What's his perimeter? - Simplify 2

Simplify expression: 5ab-7+3ba-9