Bruh, this must be so confusing oh well maybe when i actually get to learn this stuff it may be easier for me then ok
Answer:
the answer is 1240
Step-by-step explanation:
1st you have to find the area of each surface and then add all the numbers together
(22x10)+(22x10)+(22x10)+(22x10)+(18x10)+(18x10)
then solve
220+220+220+220+180+180
1240
3u + 21 divide 3 by both sides and your answer would be u= 7 :)