Three Wheel Bicycles Rims
5.6Solving Problems by working backwords Math?
The rim of a bicycle wheel has a circumfrence of 256.3cm. use this information to write three problems that can be solved by working backwards. Solve your problems
The three questions you could have are:
1. What is the diameter of the bicycle wheel?
2. What is the radius of the bicycle wheel?
3. What is the area of the bicycle wheel?
Knowing that the equation for circumference is c=pi*radius (also c=2*pi*radius), you can solve for the first question by dividing the circumference by pi.
Note: * = multiply C= the distance 256.3cm
1. 256.3cm/ pi = 81.5828… = approx. 81.58cm
The radius is half of the diameter and so:
2. 81.58cm/2 = 40.79 cm
Finally, the area of the circle can be found with the equation A = pi*(radius)^2
3. Area= pi*(40.79cm)^2 = pi*(1663.8241) = 5227.05756…= approx. 5227.06cm^2
Hope this helps! You could consider this solving backwards because you are continuously using information that is given or solved for and plugging the values back into different equations.
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