# 6th grade math homework help?

Topic: 6th grade math homework help?
April 22, 2019 / By Tilly
Question: Hello, I have a math problem I need to solve: "The front wheels of a truck have a diameter of [x] feet, while the back wheels have a diameter of [x+1] feet. If the truck travels one mile, how many more revolutions (rotations) will a front wheel make more than a back wheel?" X represents a number, I don't remember what. Could you please tell me how to solve the problem? Am I supposed to... 1. Find the number of feet in a mile, divide it by the circumference of each wheel and find the difference between the two or 2. Find the number of feet in a mile, divide it the diameter of each wheel and find the difference? Thank you, please just answer the question as either method one or method two.

Roxie | 3 days ago
You're a good kid. Not looking for the answer - I respect that. I would recommend approach 1.
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1. 300 100 x 3 4 x 25 x 3 2 x 2 x 3 x 5 x 5 2. C (because it's PEOPLE to BOATS, not BOATS to PEOPLE -- trick question in a way)

Natalee
Since you don’t know the number x represents I can’t tell you the answer but show you the method instead. The Circumference of a circle is C = 2 x Pi x Radius Where Pi = 3.14 two significant digits… you can use 3.14159 but I will use the former. Substitution for x lets say 16, 17 where x =16 and x + 1 =17 where 2PI = 6.28 6.28 times 16 = 100.48 and 6.28 times 17 =106.76 Lets call the distance traveled D: So D in feet = 5,280 or 63,360 inches. We know that one revolution of the back tires = 106.76 inches so, therefore, So doing some math to figure out how many revolutions by the back tire is: 63,360 /106.76 = 593 revolutions for the back tire. 63,360 / 100.48 = 630 revolutions for the front tire. So the front tire has to turn 630 - 593 = 37 more times given it is 16 inches. BOOM….
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Lorna
in order for a wheel to make a full revolution, it must travel the length of its circumference. do to find the answer, you must use method number 1. hope this helped.
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Katheryn
i am in 7th and we hav not learned that yet and we won the intel school of distiction for math in the country
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