Answer
There are 3 pairs of rectangular faces on this figure.
Total surface area = 276 cm²
Step-by-step explanation
A cuboid or a rectangular prism has 3 pairs of rectangular faces.
Hence, the surface area is given as
Total surface area = 2 (LB + LH + BH)
where
L = Length of the cuboid = 7 cm
B = Breadth of the cuboid = 4cm
H = Height of the cuboid = 10 cm
Total surface area = 2 (LB + LH + BH)
Total surface area = 2 [(7×4) + (7×10) + (4×10)]
Total surface area = 2 [28 + 70 + 40]
Total surface area = 2 (138) = 276 cm²
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