I believe it would be 470 cm.
For the blue figure, there are two 2 by 2 panels and three 7 by 2 panels that would be exposed to the surface
So (7•2)•3 = 42 and (2•2)•2 = 8 so 42•8=50
The green panel is made up of four 12 by 7 panels and two 7 by 7 panels, with one of them being covered with a 14 cm part.
So (7•12)•4 = 336 and 7•7 = 49. The top part would be 49-14=35 so 336 + 49 + 35 = 420
And 420 + 50 = 470
Please correct me if I am wrong, have a good day!
Answer: A and D
Step-by-step explanation:
Well
It needs to calculate the volume of a rectangular prism (10*20*20) and subtract from it the volume of a half cylinder with a radius of 10 cm and height of 20
as follows:
prism volume = 10*20*20 = 4000 cm^3
half cylinder volume = 0.5 * pi * r^2 * h = 0.5* 3.14 * 10^2 * 20 = 3140 cm^3
Subtract 3140 from 4000, results in: 860 cm^3
I hope that explains what you are stuck in
