Ans: The corret ans is option (c) i.e 2 REASON for a cuboid of 13x3= 39 cuboids for 1 layer and also taking the parameter of base it is 13(2x2)+ 3(2x2) = 52+12 =64cm so total 78 cubes will be used for 39x2 =78 hence the correct answer is 2cubes height