What is the total surface area of a cuboid whose length, breadth and height are 7 cm, 5 cm and 9 cm, respectively?
Answer & explanation
Correct answer: option 3
We know that, TSA(Cuboid) = 2 x (LB + BH + HL)
Length, = 7 cm
Breadth = 5 cm
and height =9 cm
TSA = 2 x [(7)(5) + (5)(9) + (9)(7)]
TSA = 2 x [35 + 45 + 63]
TSA = 286 cm2