A) 4
B) 0
C) 150
D) 300
Correct Answer: D
Solution :
Volume of 4 cm cube \[=64\,\,c{{m}^{3}}\] When it is cut into 1 cm cube, the volume of each of the cubes \[=1\,\,c{{m}^{3}}\] Hence, there will be 64 such cubes. Surface area of small cubes \[=6\times {{(1)}^{2}}=6\,\,sq\,\,cm\] Therefore, the surface area of 64 such cubes \[=64\times 6=384\,\,sq\,\,cm\] The surface area of the large cube \[=6\times {{(4)}^{2}}=6\times 16=96\,\,sq\,\,cm\] \[\therefore \]Percentage increase \[=\frac{384-96}{96}\times 100=300%\]
You need to login to perform this action.
You will be redirected in
3 sec
