1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Ber [7]
3 years ago
5

An old-fashioned bicycle has two differently sized wheels. The circumference of the front wheel is 9 feet larger than the circum

ference of the back wheel. Thomas biked for a while and, according to his equipment, the front wheel went all the way around 500 times and the smaller wheel went all the way around 1400 times. How far, in feet, did Thomas bike?

Mathematics
2 answers:
Lady_Fox [76]3 years ago
8 0
So, the bicycle looks like the one in the picture below.

now, the circumference of the smaller wheel, will just be C = 2πr, with a radius of "r".

we also know that the large wheel has a circumference that is 9 feet larger than the small one, so, since the small one has a circumference of 2πr, then the large one will have a circumference of 2πr + 9.

after Thomas cycled for a while, the large did 500 revolutions, or times around, whilst the small one did 1400, since it's smaller.  On that time, they covered however, the same amount of ground, since they're on the same bike.

The amount covered by the small one in 1400 cycles, is 1400(2πr), that's how much ground it covered.

The amount covered by the large one in 500 cycles, is 500(2πr + 9).

And we know that ground covered, is the same for both, therefore, we also know that   1400(2πr)  =  500(2πr + 9).

\bf \stackrel{small~wheel}{1400(2\pi r)}~~=~~\stackrel{large~wheel}{500(2\pi r+9)}\implies 14(2\pi r)=5(2\pi r+9)
\\\\\\
28\pi r=10\pi r+45\implies 18\pi r=45\implies r=\cfrac{45}{18\pi }
\\\\\\
\boxed{r=\cfrac{5}{2\pi }}

so, how much ground did they cover anyway?

well, we could use either, since we know what the radius is, hmmmm let's use say the small wheel's circumference,

\bf 1400(2\pi r)\implies 1400\left(\underline{2\pi }\cdot \cfrac{5}{\underline{2\pi }}  \right)\implies 1400(5)\implies \stackrel{feet}{7000}

Tanzania [10]3 years ago
6 0
1400x=500(x+9)

x=9 feet
You might be interested in
Convert 32 ounces to pounds
Triss [41]

Answer: 2 pounds

Step-by-step explanation: There are 16 ounces in one pound. So when you divide 32 by 16, you get 2. Therefore your answer would be 2 pounds!

4 0
3 years ago
Read 2 more answers
Simplify. 2,500,000 to the zero power
Sophie [7]

Answer:

1

Step-by-step explanation:

any number that is raised to the zero power will equal to 1. hope this helps!

6 0
3 years ago
Read 2 more answers
What is the value of this expression <br>5+(5-9)^2+3(16÷8)​
kaheart [24]

Answer:

27/4 or 6 3/4

Step-by-step explanation:

I can't put it in the box because its gonna take to long but it is correct

3 0
2 years ago
Read 2 more answers
Can someone solve this ASAP.
Dimas [21]

Answer:

where's the picture?

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
What is the area of the trapezoid shown ?
Irina18 [472]

Answer:

A = 1/2 * (a + c) * h

A = 1/2 * (6 + (2 + 6 + 2)) * 6 = 48

5 0
2 years ago
Other questions:
  • What is the circumference of the circle with a diameter of 33?
    15·1 answer
  • Please help asap 30 pts
    9·2 answers
  • PLEASE HELP MEEEE!!!I WILL GIVE BRAINLIEST !!~!~!The ordered pairs {(1, 2), (2, 3), (3, 4)} could be answers for the function ru
    9·1 answer
  • What is the slope of <br> y-6=-1-6/4-1(x-1)
    10·1 answer
  • A car leaves Albany, NY, and travels west toward Buffalo, NY. The equation D =280-59t can be used to represent the distance, D,
    14·1 answer
  • A number is increased by 25% and the resulting number is then decreased by 20%. The final number is what percent of the original
    12·1 answer
  • In the parallelogram below, z = ?°
    14·1 answer
  • The residents of a city voted on whether to raise property taxes. The ratio of yes votes to no votes was 5 to 3 . If there were
    15·1 answer
  • You have two cards with a sum of (-12) in your hand. What two cards could you have? *
    8·1 answer
  • Factor 5z^2+45z. The factored polynomial is _
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!