You can use a scale factor of 2 to dilate the original and get the final. I got this answer by doing:
y x 6 = 6y (y represents the original rectangle, 6y represents the second rectangle)
then, 6y x 1/3 = 2y (2y represents the final rectangle)
If you compare the original rectangle (y) to the final (2y), you see that the final is 2 times the original, therefore the scale factor is 2
If you can use a calculator. take -8/3 and divide it by 6
Answer:
The cone has a greater height because the bases are the same, but the volume of the cylinder is less than 3 times the volume of the cone.