A closed box is a cuboid in shape with length = 40 cm, breadth = 30 cm and height = 50 cm. It is made of thin metal sheet. Find the cost of metal sheets required to make 20 such boxes, if 1 m² of metal sheet costs 45.
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Answered by
1
Answer:
I hope it will help you
Step-by-step explanation:
We need to calculate the total surface area of the cuboid to solve this question.
Total surface area of a cuboid of length l, breadth b and height h =2(l×b+b×h+l×h)
So, the total surface area of the cuboid =50cm=2(40×30+30×50+40×50)
=2(1200+1500+2000)=9400cm
2
Total surface area of 20 boxes =20×9400cm
2
=188000cm
2
=18.8m
2
Total cost =Rs45×18.8m
2
=Rs846
Answered by
1
Step-by-step explanation:
TSA = 2 ( lb + bh + hl )
=2(40*30+30*50+50*40) cm^2
=2 (1200+1500+2000) cm^2
=2(4700) cm^2
=9400 cm^2
=(9400/10000) m^2
= 0.94 m^2
Cost of 1 m^2 = ₹ 45
Cost of 0.94 m^2 = ₹(45*0.94) = ₹ 42.3
Cost of 20 boxes = ₹ (42.3*20) = ₹ 846
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