By the end of this lesson, you'll solve:
"A water tank is 2m long, 1.5m wide, and 1m tall. How many liters of water does it hold? (Hint: 1 cubic meter = 1000 liters)"
Cuboid (Rectangular Box)
Picture this: your lunchbox, your room, a brick -- all cuboids! A cuboid has length (l), breadth (b), and height (h).
Length4
Width3
Height5
Volume60
Surface Area94
Key Points
- 1Volume = l x b x h (space inside)
- 2Total Surface Area = 2(lb + bh + hl) (all six faces)
- 3Lateral Surface Area = 2h(l + b) (four walls only, no top/bottom)
- 4Cube: special cuboid where l = b = h
Pro Tip
Cube shortcuts: Volume = a^3, TSA = 6a^2, LSA = 4a^2.
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