Question

the sum of Length breadth and height of a cuboid is 25 centimetre and square of its longest diagonal is 225 CM square find the TSA​

Answer 1

Step-by-step explanation:

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

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