Today in class I was assigned question 9 to do for the blog.

**Examine the bookshelf. It is constructed of thin hardwood. The top, bottom, and all three shelves are the same size. There is an equal distance between the top, the shelves, and the base.**

**a) What is the surface area of one shelf?**

**A= l x w (2)**

**A= 90 x 24 (2)**

**A= 4 320 cm**

**You have to multiply by two because theres both a top and bottom in the smaller inside shelf.**

**b) What is the total surface area of the bookcase?**

**For the tops and undersides of the entire bookshelf you have to go Length x Width x 10**

**I got the 10 because there are 5 identical surfaces (add both sides of them equals 10)**

**The sides of shelves (There are 2 but you have to do both sides)**

**120 x 24 x 4 = 11 520cm**

**The very back of the shelf (Multiplied by 2 both sides)**

**90 x 120 x 2 = 21 600**

**You add all of the pieces together :**

**TSA= 21 600+11 520+21 600**

**TSA= 54 720cm**

Nice blog binesi! LOL

ReplyDeleteGood job Binesi! This question is pretty hard but you still explained it. I don't know if you made any mistakes coz I don't get this question :P

ReplyDeleteGood job binesi. I like how you explained the questions and it doesnt look to me like there are any mistakes.

ReplyDelete