Question
Find the volume, lateral surface area and the total surface area of the cuboid whose dimensions are:
Length $=15 m$, breadth $=6 m$ and height $=9 dm$.
Length $=15 m$, breadth $=6 m$ and height $=9 dm$.
✓
Answer
Length of cuboid $( l )=15 m$
Breadth $(b)=6 m$
Height $(h)=9 dm =0.9 m$
a. Volume $= lbh =15 \times 6 \times 0.9=81 m^3$
b. Lateral surface area $=2(l+b) \times h$
$=2(15+6) \times 0.9 m^2$
$=2 \times 21 \times 0.9=37.8 m^2$
c. Total surface area $=2[ lb + bh + hl ]$
$=2(15 \times 6+6 \times 0.9+0.9 \times 15] m ^2$
$=2[90+5.4+13.5] m ^2$
$=2 \times 108.9=217.8 m^2$
Breadth $(b)=6 m$
Height $(h)=9 dm =0.9 m$
a. Volume $= lbh =15 \times 6 \times 0.9=81 m^3$
b. Lateral surface area $=2(l+b) \times h$
$=2(15+6) \times 0.9 m^2$
$=2 \times 21 \times 0.9=37.8 m^2$
c. Total surface area $=2[ lb + bh + hl ]$
$=2(15 \times 6+6 \times 0.9+0.9 \times 15] m ^2$
$=2[90+5.4+13.5] m ^2$
$=2 \times 108.9=217.8 m^2$
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