A) \[1.08{{m}^{2}}\]
B) \[1.56{{m}^{2}}\]
C) \[1.84{{m}^{2}}\]
D) \[2.16{{m}^{2}}\]
Correct Answer: D
Solution :
[d] Volume of the new cube \[={{\left( 0.3 \right)}^{3}}+{{\left( 0.4 \right)}^{3}}+{{\left( 0.5 \right)}^{3}}\] \[=0.216\,\,{{m}^{3}}={{(0.6)}^{3}}\] \[\therefore \] edge of cube = 0.6 m Surface area \[=6\text{ }{{\left( 0.6 \right)}^{2}}\text{ }{{m}^{2}}\text{ }=\text{ }2.16\text{ }{{m}^{2}}.\]
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