Cardboard box-shaped quadrangular prism with a rhombic base. Rhombus has a side 5 cm, and one diagonal 8 cm long, and the box's height is 12 cm. The box will open at the top.

How many cm2 of cardboard do we need to cover overlap and joints that are 5% of the area of cardboard?

Correct answer:

S =  277.2 cm2

Step-by-step explanation:

S1=512=60 cm2 s=(5+5+8)/2=9 S2=s(s5)(s5)(s8) S2=9(95)(95)(98)=12  S=(1+5/100)(4S1+2S2) S=1.05(240+24)=277.2 cm2

Did you find an error or inaccuracy? Feel free to write us. Thank you!

Tips for related online calculators
Our percentage calculator will help you quickly calculate various typical tasks with percentages.
See also our trigonometric triangle calculator.

You need to know the following knowledge to solve this word math problem:

We encourage you to watch this tutorial video on this math problem: video1   video2   video3

Related math problems and questions: