13. Jonas collects and builds model airplanes. He wants to build a 1:20 scale model of a floatplane. He searches the Internet for information about the real plane and learns that it has a wingspan of 36 ft, a length of 26 ft 2 in., and a height of 7 ft 6 in. Jonas wants to build a glass display case, in the form of a rectangular prism, for his scale model. He wants the dimensions of the display case to be 20% larger than each dimension of the model. Determine the dimensions of Jonas's display case. Lesson 8.6 14. Cone A is a reduction of cone B, with a scale factor of 1:9. Cone A has a volume of 20 cm3. What is the volume of cone B? 15. A chocolate bar is sold in a package, as shown. The manufacturer doubles the volume of the chocolate to create a larger bar, similar in shape to the original bar. Determine the surface area, to the nearest square centimetre, of the package that is needed for the new bar. 4 cm 4 cm 20 cm 4 cm 16. A cellphone company advertises that it has created a similar version of its most popular phone, reducing the volume and mass of the original phone by 48.8%. The original phone is a rectangular prism, 50 mm wide by 95 mm long by 10 mm high. Determine the dimensions of the new phone