Project on volume and surface area of cube and cuboid
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cuboid is made of six rectangles (where, l,b, and h are the three edges of a cuboid). The area of the six rectangles in consecutive order from 1 to 6 are:
1) area = (l × h)
2) area = (l × b)
3) area = (l × h)
4) area = (l × b)
5) area = (b × h)
6) area = (b × h)
When we sum up all the areas we get the surface area of the cuboid = 2(l*b) +2(b*h) + 2(l*h) =2(lb+bh+hl). The surface area of a cuboid hence is:
Surface Area = 2 (lb + bh + hl)
1) area = (l × h)
2) area = (l × b)
3) area = (l × h)
4) area = (l × b)
5) area = (b × h)
6) area = (b × h)
When we sum up all the areas we get the surface area of the cuboid = 2(l*b) +2(b*h) + 2(l*h) =2(lb+bh+hl). The surface area of a cuboid hence is:
Surface Area = 2 (lb + bh + hl)
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