Dogsrulelife03 Dogsrulelife03

16-05-2018
Mathematics

contestada

A student calculates that the circumference of a tire with a rim diameter of 15 inches and a sidewall width of 5.5 inches is 64.40 inches by doing the following calculation: (15+5.5)xpi. Explain the error.

Respuesta :

calculista calculista

25-05-2018

we know that
the formula of circumference is
C=pi*D
diameter=15 in
so
C=15*pi-----> 47.10 in

the error was having added to the diameter the sidewall width for the calculation of the circumference

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