okay so first to find the surface area of the net below you should always start from the line that is pointing at the end of the the i n u m so you see that is between 8 1/8 and 2 so you see the line you draw a line in the middle between 8 and then when you look and then you draw another line were 19 years and then you draw another line so you can see that at the top of 19 and there at the bottom of 918 you see that you can find the Nets below because you can see me you draw your line it shows you Drawing the Line because when you draw a circle in the middle and then you draw a another little circle in the middle is shows the surface area of the net below so bye
Use similar volume to calculate which is the (ratio of edges)^3 = (ration of volume) so just put the numbers in, let the volume of smaller pyramid be y. (3/4)^3 = y/320 27/64 = y/320 y=135in3
