Question

The sum of length breadth and height of a cuboid is 41cm. The lenght of diagonal is 25 cm

Answer 1

L+B+H = 25 cm
Diagonal = 15
√(L²+B²+H²) = 15
L²+B²+H² = 15²
(L+B+H)²-2(LB+BH+HL) = 225
25²-225 = 2(LB+BH+HL)
625-225 = Surface area of cuboid
Surface area = 400cm²