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# A rectangular football field with sides 110 mx 80 m

Fingka.com – The learning program from Rumah TVRI today Monday 8 June 2021 for Elementary Level 4th 6th graders will learn about Circumference of Flat Shapes and Area of ​​Circles.

The material for Circumference of Flat Shapes and Area of ​​a Circle from the Love of Mathematics with Mr. Ridwan will be broadcast on TVRI for elementary school students in grades 4-6 starting at 09.00 WIB to 09.30 WIB

After watching the show Love mathematics with Mr. Ridwan through TVRI broadcasts today, Monday 8 June 2021, elementary students in grades 4-6 are expected to be able to answer the TVRI questions that have been prepared.

Here, Fingka.com provides a summary of the Answer Material for the TVRI Question Monday, June 8, 2021, elementary school grades 4-6 with the complete Circumference of Flat Shapes and Circle Area below

## A football field is rectangular. The side length is 110 mx 80 m. If Edo ran around the field 5 times, how many meters did Edo run?

Rectangular formula

Area = length x width

Perimeter = 2 x (length + width)

Length = area: width

Length = perimeter : 2 – width

Width = area : length

Width = perimeter : 2 – length

Is known:

Field length = 110 meters

Field width = 80 meters

Surround 5 times

How many meters did Edo travel?

Perimeter of the Field = 2 (p+l)

= 2 ( p + l )
= 2 x (110 + 80)
= 2 x 190
= 380
Perimeter of the football field = 380 m

Distance covered by Edo = 5 x circumference of the field
= 5 x perimeter of the field
= 5 x 380
= 1900

So Edo runs = 1900 m

### Mr. Indra has a car. The radius of the car tire is 21 cm. When the car is running, the tires rotate 200 times. How many meters has the car traveled?

Calculating Perimeter = K = 2 x xr

K = 2 x xr
K = 2 x 22/7 x 21
K = 132 cm

The distance covered when the car tire rotates 200 times:
Distance = Perimeter × Number of turns
Distance = 132 × 200
Distance = 26400 cm
Distance = 264 m

So the distance covered by the car = 264 m

### A circular garden. The park has a circumference of 88 m. How many square meters is the garden area?

Is known:

Perimeter = 88 m

How many square meters is the garden area?

We look for the garden radius first

K = 2 x xr
r = K / 2π
r = 88 / 2 x 22/7
r = 88 x 7 / 44
r = 14 m

Now we calculate the area of ​​the circle

The formula for the area of ​​a circle = x r²

Area = x r²

= 22/7 x 14 x 14

= 616 square meters

So the area of ​​the garden is = 616 m²

For Tuesday, June 9, 2021, elementary school students in grades 4-6 will study material on X-Science: Organ System Mechanisms.

The following is a grid of TVRI questions June 9, 2021 Elementary School Grades 4 6 that can be studied at home

Two measuring cups large and small. A large glass filled with water and a small glass face down in a large glass. The volume of water is 750 cm3. Iwan and Bedu each exhaled air into the glass with a straw. The amount of air blown by Iwan is 250 cm3 and Bedu is 125 cm3. Which lungs can hold the most air? Please explain your opinion!

How does the process of digestion of food occur in our digestive system? Try to explain!

Write down the three parts of blood! Try to explain the function of each in our body!