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A solid metallic cuboid of dimensions 18...

A solid metallic cuboid of dimensions 18 cm x 36cm × 72cm is melted and recast into 8 cubes of the same volume. What is the ratio of the total surface area of the cuboid to the sum of the lateral surface area of all 8 cubes?
18 सेमी x 36 सेमी x 72 सेमी आयाम वाले एक ठोस धात्विक घनाभ को पिघलाकर समान आयतन वाले 8 घन में पुन्गठित किया जाता है। घनाभ के कुल सतह क्षेत्रफल से सभी 8 घन के पार्श्व सतह क्षेत्रफल का अनुपात क्या है?

A

`2 : 3`

B

`7 : 8`

C

`4 : 7`

D

`7 : 12`

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