The diameter of a soup can is 7cm. The label wraps around the can. About how many centimeters long must the label be to go all the way around the soup can?(use 22/7 for pi) explain how to mentally check whether your answer is reasonable.

Answer 1

circumference = 2πr or dπ
= 6π
= ..

good grief, who still uses 22/7 for π ??

Answer 2

the diameter of a soup can is about 7 cm. about how many cm long must the lable be to go all the way around the soup can?