Question

The sum of the length, breadth and depth of a cuboid is 19 cm and its diagonal is 5$\sqrt{5}$cm. Its surface area is

(a) 361 cm²

(b) 125 cm²

(c) 236 cm²

(d) 486 cm²

Answer 1

Let,

Length of the cuboid

Breadth of the cuboid

Height of the cuboid

We have,

, diagonal of the cuboid

We are asked to find the surface area

So, the surface area,

Thus, the surface area is

Hence, the correct choice is (c).