A larger cube is formed from the mate...

A larger cube is formed from the material obtained by melting three smaller cubes of 3, 4 and 5 cm side. The ratio of the total surface areas of the smaller cubes and the larger cube is (a) 2 : 1 (b) 3 : 2 (c) 25 : 18 (d) 27 : 20

`2:1 `

`3:2`

`27:20 `

`25:18 `

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