Question

Two cube each of edge 12 cm are joined .The surface area of new cuboid is (a)140cm square
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Answer 1

Answer:

244

Step-by-step explanation:

Answer 2

ONLY THE LENGTH OF NEW CUBOID WILL CHANGE. THE BREADTH AND HIGHT WILL NOT CHANGE.

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TOTAL SURFACE ARE OF CUBOID=2(lb+bh+hl)

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l=12+12=24 ; b=12 ; h=12

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PUTTING THE VALUES IN THE FORMULA WE GET:--

==>2(lb+bh+hl)

==>2(24*12+12*12+12*24)

==>2(288+144+288)

==>2*720

$\huge{ \bold{ \Longrightarrow{1440 {cm}^{2} }}}$