62 small identical cubes are used to form a large cube. How many more cubes are needed to add one top layer of small cube all over the surface of the large cube ? Choose the correct choice from the following answers:
A) 64
B) 128
C) 152
D) 154
E) 256
62 small cube will make a large cube with 4 cubes in each line i.e.   Adding one layer will require one cube at each end and hence new cube will have 6 cubes in each line.   Total number of small cubes in new cube = 6^3 = 216   Extra cube required = 216 - 62= 
<gadget id="calculator">216 - 62</gadget>
<output>154</output>
154   Hence, 154 is the answer.
<result>D</result>
62 small identical cubes are used to form a large cube. How many more cubes are needed to add one top layer of small cube all over the surface of the large cube ?