Question

$13. \: \: three \: cubes \: of \: \\ metal \: with \: edge \: 3 \: cm \\ and \: 4 \: cm \: and \: \\ 5 \: cm \: respectively \: \: are \: melted \: \\ to \: form \: a \: single \: cube. \\ find \: the \: lateral \: surface \: area \\ of \: the \: new \: cube \: so \: formed.$
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Answer 1

Answer:

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Step-by-step explanation:

volume of cube = volume of 3 cube

acube = 3cube x 4cube x 5cube

a = 3 x 4 x 5

a = 60

lsa of cube = 4a2 = 4x60x60 = 14400