Daphne has a rope that is 60 meters long. She wants to use it to mark the boundary of a circle whose radius is an integer. What's the largest possible radius for her circle, in meters?

KeyLimePi Mar 10, 2019

#2**+1 **

*Daphne has a rope that is 60 meters long. She wants to use it to mark the boundary of a circle whose radius is an integer. What's the largest possible radius for her circle, in meters?*

Boundary is another way of saying circumference.

Circumference = pi times diameter

60 = 3**.**14 x D

D = 60/3**.**14 = 19**.**11

Radius is half the diameter so the radius would be 9**.**55

Truncating to an integer, the largest radius would be 9 meters

.

Guest Mar 10, 2019

#2**+1 **

Best Answer

*Daphne has a rope that is 60 meters long. She wants to use it to mark the boundary of a circle whose radius is an integer. What's the largest possible radius for her circle, in meters?*

Boundary is another way of saying circumference.

Circumference = pi times diameter

60 = 3**.**14 x D

D = 60/3**.**14 = 19**.**11

Radius is half the diameter so the radius would be 9**.**55

Truncating to an integer, the largest radius would be 9 meters

.

Guest Mar 10, 2019