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  • The sum of length, breadth and height of the cuboid is 20 cm and the length of its diagonal is 12 cm. Find the surface area of the cuboid?

The sum of length, breadth and height of the cuboid is 20 cm and the length of its diagonal is 12 cm. Find the surface area of the cuboid?

Answers (1)

Sum of the length(l), breath (b), and height (h) = 20cm

l+b+h =20 cm

l2+b2+h2  = 122 cm2 

l2+b2+h2  = 144 cm2

(l+b+h)2 =l2+b2+h2 + 2(lb+bh+hl)

Surface area of the cuboid = 2(lb+bh+hl)

202=144+ Surface area

Surface area = 256 cm²

Posted by

Ravindra Pindel

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