For the following two complexes A:[NiCl6]4− and [NiCl4]2− the ratio of CFSE will be nearly:
The ratio of the radii of two cylinders is 2:3 and the ratio of their heights is 5:3.The ratio of their volumes will be
(a) 4:9
(b) 9:4
(c) 20:27
(d) 27:20