Problem number 13. A toy pony is inside of boxes one meter tall, one meter wide, and two meters long. A ribbon goes around the box as shown. The gnat uses an extra one meter of ribbon. How long is the ribbon in total? 9 meters, 11 meters, 13 meters, 15 meters, or 17 meters? Let's mark the lengths of the ribbons. We have one meter for how tall the box is, one meter for how wide it is, and also one meter up here on top, because that's also the width of the box, and two meters for the length. And we need to realize that the sides we cannot see will be the same as the sides that we can see. So the bottom will also have one meter of length, the far side will have one, and the side opposite the ribbons that cross will also have a length 2 and a length 1. So let's add the lengths. We have 1 plus 1 plus 1 plus 2 or 5 for the ribbons we can see. The same thing for the parts of the ribbons that we cannot see, plus 1 meter for the gnat, for a total of 11 meters. The answer is B.

toy pony

ribbon length

box dimensions

calculation

gnat