A solid cuboid has a length of 7 cm, a width of 5 cm, and a height of 4 cm. Calculate its total surface area.

  • A 280 cm\(^2\)
  • B 166 cm\(^2\)
  • C 140 cm\(^2\)
  • D 83 cm\(^2\)
waec 2020mathematics

The correct answer is B. 166 cm\(^2\)

Total = 2(LB + BH + LH) 

Surface area 

= 2(7 x 5 + 5 x 4 + 7 x 4)

= 2(35 + 20 + 28)

= 2(83) 

= 166cm\(^2\)

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