A box 4

A box open at the top has a rectangular base 200mmx300mm and an altitude of 150mm. If the base and the sides are 10mm thick, find the total surface area of the box.

Correct answer:

A =  3988 cm2

Step-by-step explanation:

a=200 mm cm=200:10  cm=20 cm b=300 mm cm=300:10  cm=30 cm c=150 mm cm=150:10  cm=15 cm t=10 mm cm=10:10  cm=1 cm  S1=a b+2 (a+b) c=20 30+2 (20+30) 15=2100 cm2  x=a2 t=202 1=18 cm y=b2 t=302 1=28 cm z=ct=151=14 cm  S2=x y+2 (x+y) z=18 28+2 (18+28) 14=1792 cm2  S3=a bx y=20 3018 28=96 cm2  A=S1+S2+S3=2100+1792+96=3988 cm2



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



avatar







Tips to related online calculators
Do you want to convert area units?

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

Related math problems and questions: