Question

The length of the diagonal of a cuboid is 5√5cm and the sum of its length,breadth and height is 19cm. Find its surface area

Answer 1

let length,breadth,height be a,b,c respectively..

According to question,,
                  a+b+c=19
and√a2+b2+c2=5√5

squaring on both sides.

NOTE:remaining ans is in the below pic

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