MATH SOLVE

2 months ago

Q:
# Mario computes the circumference of his 15β wide bicycle tire as 23.55 inches. What was his error?He multiplied by the diameter instead of the radius.He squared the radius instead of doubling it.He used the radius instead the diameter.He multiplied the diameter and radius in the formula.

Accepted Solution

A:

we know that

[the length of a circumference]=2*pi*r-------> pi*D

i Diameter D=15 in

[the length of a circumference]=pi*15------> 47.1 in

therefore

the answer is

He used the radius instead the diameter.

[the length of a circumference]=2*pi*r-------> pi*D

i Diameter D=15 in

[the length of a circumference]=pi*15------> 47.1 in

therefore

the answer is

He used the radius instead the diameter.