Verified answer

Given that,

Length=5m

Breath =3m

Height =4m

We know that,

Total surface area of sheet=2(lb+bh+hl)

=2(5×3+3×4+4×5)

=2(15+12+20)

=2×47

=94

But by condition without line.

Total surface area-lb

94−15=79m2.

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52

Step-by-step explanation:

area of cuboid (l×b×h)

5×3×4

= 52