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The ratio of the length, width and height of a cuboid is 5: 3: 2, and its area is 300 cubic centimeters. {0.0 1 cm2.
Solution: Let this rectangle be 5 cm long, 3 cm wide and 2 cm high.

∴5a×3a×2a=300

a=? √ 10

∴a≈2. 154

∴ Length10.77cm, width 6.46cm and height 4.3cm.

∴ Surface area: (10.77× 6.46+12.5× 4.3+6.46× 4.3 )× 2.

= 143.663×2

=287.33cm?

The surface area of this cuboid is 287.33 cm?