A cuboidal block has dimension (1.5 × 1.5 × 1.0) cm surface area of cuboid (in cm^

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A cuboidal block has dimension $(1.5 × 1.5 × 1.0)\ \ cm$ what is the surface area of cuboid (in $cm^2$)

A

$5.2$

B

$10.4$

C

$5.25$

D

$10.5$

Solution

Surface Area $=2[a b+b c+c a]$

$=2[1.5 \times 1.5+1.5 \times 1.0+1.5 \times 1.0]$

$=2[2.25+1.50+1.50]$

$=2[2.2+1.5+1.5]$

$=2 \times 5.2=10.4 \mathrm{\,cm}^{2}$

Standard 11

Physics

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