Question

Find the surface area of the top and bottom of a cuboid 12 cm long, 7 cm wide, 6•5 cm high

Answer 1

Suface area of top and bottom of cuboid = tsa-csa

Tsa of cuboid = 2(84+45.5+78)
=2*207.5=415cm²

Csa of cuboid= 2*6.5(12+7)
=13*19
=247cm²

Area of top and bottom

415-247=168cm²