Question

find the surface of a cuboid length=60mm breadth=40mm height =55​

Answer 1

surface area of cuboid = 2(lb +bh +hl)

= 2(60*40+40*55+55*60)

= 2(7900)

= 15800mm^2

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Answer 2

Answer:

total surface area=2(lb+bh+HL)

=2*(60*40+40*55+55*60)

=15,800mm^2

curved surface area=2(lb+bh)

=2*(60*40+40*55)

=9200mm^2

hope this helps u