Discover a world of knowledge at Westonci.ca, where experts and enthusiasts come together to answer your questions. Connect with a community of experts ready to help you find solutions to your questions quickly and accurately. Get detailed and accurate answers to your questions from a dedicated community of experts on our Q&A platform.

Fig. 13.47 shows a lampshade in the form of a
frustum of a cone of which
the top and
bottom
diameters are 24cm and 36cm respectively. If
the vertical height is 20cm, find, in terms of л,
the area of the material of the lampshade.