1)
you can think of the cup's sleeve as a cylinder with say a height of 4 and a diameter of 5. Now, if the diameter is 5 inches, the radius is half that, or 2.5,
2)
same here, you can think of the tire as a cylinder, since it's a cylindrical tire, with a height of 8 and a diameter of 29, therefore a radius of 14.5,
now, that's how much spaces it covers one time only, so 5 times around is just 5 times that much.
3)
same goes for the mugs,
4)
and the same goes for the can of peas, which is also a cylinder,
a)
b)
the label is only the sides, and thus only the lateral area,
you can think of the cup's sleeve as a cylinder with say a height of 4 and a diameter of 5. Now, if the diameter is 5 inches, the radius is half that, or 2.5,
2)
same here, you can think of the tire as a cylinder, since it's a cylindrical tire, with a height of 8 and a diameter of 29, therefore a radius of 14.5,
now, that's how much spaces it covers one time only, so 5 times around is just 5 times that much.
3)
same goes for the mugs,
4)
and the same goes for the can of peas, which is also a cylinder,
a)
b)
the label is only the sides, and thus only the lateral area,