Question

Two packages 42 dm x 15 dm x 9 dm and 18 dm x 15 dm x 21 dm hold the same quantity. Which package needs less quantity of cardboard to make and by how much?

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Answer 1

Step-by-step explanation:

First we need to find Total surface area of cuboid

where l= 18, b= 15 ,h= 21

= 2( lb+ bh+ lh)

= 2 ( 18*15+ 15*21+ 21*18)

=2( 630+135+378)

= 2(1143)

=2286 dm

Total surface area of second box, where L= 42,b= 15 ,h= 9

= 2( lb+ bh+ lh)

= 2 ( 42*15+ 15*9+ 9*42)

=2( 270+315+378)

= 2(963)

=1926 dm

Second package needs less quantity of cardboard to make , by 2286 - 1926= 360dm