Math, asked by khushank08, 5 months ago

1. Two cubes each of volume 27 cm are joined end to end to form a solid.
Find the surface area of the resulting cuboid.
(CBSE 2011, 14)​

Answers

Answered by sanjawad
0

Answer:

2*27 = 54 cm^2 is answer

Answered by ajay8949
1

\:\:\:volume \: of \: cube \:  = 27cm {}^{3}

 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  {a}^{3}  = 27cm {}^{3}

 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: a =  \sqrt[3]{27cm {}^{3} }

 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: a = 3cm

surface \: area \: of \: resultning \: solid

csa \: of \:first \: cube \:  + csa \: of  \: second \: \: cube

 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: 4 {a}^{2}  + 4 {a}^{2}

 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: 4  \times {3}^{2}  + 4  \times {3}^{2}

 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: 4 \times 9 + 4 \times 9

 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: 36 + 36

 \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: 72cm {}^{2}

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