Question

a cubical steel box is dimensions of 50cm by 60 cm by 70 cm.find the cost of the steel required for making 20 such steel, if 1 square metre of a steel sheet cost rs 60.

Answer 1

total surface area of each box=2(lb+bh+lh)
=2(0.5*0.6+0.5*0.7+0.6*0.7)
=2(0.3+0.35+0.42)
=2*1.07
=2.14m^2

Total surface area of 20 box=20*2.14
=42.8m^2

cost=42.8*60
=Rs.2568

Answer 2

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