Wheel diameter

A 1m diameter wheel rolled along a 100m long track. How many times did it turn?

Result

n =  31.831

Solution:

$D = 1 \ m \ \\ o = \pi \cdot \ D = 3.1416 \cdot \ 1 \doteq 3.1416 \ m \ \\ s = 100 \ m \ \\ n = s/o = 100/3.1416 \doteq 31.831 = 31.831$

Our examples were largely sent or created by pupils and students themselves. Therefore, we would be pleased if you could send us any errors you found, spelling mistakes, or rephasing the example. Thank you!

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

Be the first to comment!

Next similar math problems:

1. Grower
Grower harvested 190 kg of apples. Pears harvested 10 times less. a) How many kg pears harvested? b) How many apples and pears harvested? c) How many kg harvested pears less than apples?
How much and how many times is 72.1 greater than 0.00721?
3. Theater
The theater has in each row with 19 seats. Ticket to the first 10 rows is for 30 USD. In next rows is for 15 USD. The theater was completely sold out. Revenue was 12255 USD. How many rows are in the theater?
4. Short cut
Imagine that you are going to the friend. That path has a length 330 meters. Then turn left and go another 2000 meters and you are at a friend's. The question is how much the journey will be shorter if you go direct across the field?
5. Root
The root of the equation ? is: ?
6. Movement
From the crossing of two perpendicular roads started two cyclists (each at different road). One runs at average speed 28 km/h, the second at average speed 24 km/h. Determine the distance between them after 45 minutes cycling.
7. Time
Write time in minutes rounded to one decimal place: 5 h 28 m 26 s.
8. Prism X
The prism with the edges of the lengths x cm, 2x cm and 3x cm has volume 20250 cm3. What is the area of surface of the prism?
9. Balls
Three metal balls with volumes V1=71 cm3 V2=78 cm3 and V3=64 cm3 melted into one ball. Determine it's surface area.
10. Hens
11 hens will eat spilled grain from 6AM to 16 PM. At 11 hour grandmother brought 4 hens from the neighbors. At what time was grain out?
11. Cube 6
Volume of the cube is 216 cm3, calculate its surface area.