Question

A 4 cm sided cube is cut into 1 cm sided cubes.What is percentageincrease in surface area after such cutting

Answer 1

A 4cm sided cube is cut into 1cm sided cube..
then, no. of small cubes = 16 * 4 = 64
Surface area of big cube = 4*4*4 = 64 sq units
Surface area of small cube = 4*1*1= 4sq units
surface area of all small cubes = 64*4= 216 sq units
percentage increase = (216-64)/64* 100 = 152/64*100 = 237.5 %