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# Surface area questions watch

1. Attachment 561112561114Q3- I understand that you calculate the sa of the bedroom and bathroom together so 10.56 m2 - 8.76 = 1.8 but why do you divide by 1.2 (smaller wall) to get the bigger wall??

4 - I really don't understand the method..
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2. (Original post by AqsaMx)
Attachment 561112561114Q3- I understand that you calculate the sa of the bedroom and bathroom together so 10.56 m2 - 8.76 = 1.8 but why do you divide by 1.2 (smaller wall) to get the bigger wall??

4 - I really don't understand the method..
You divide by 1.2 because what you had was the area of the bathroom and you want the longer side of the bathroom so to get that you divide the area by the length of the shorter side: 1.2
3. (Original post by smartalan73)
You divide by 1.2 because what you had was the area of the bathroom and you want the longer side of the bathroom so to get that you divide the area by the length of the shorter side: 1.2
Okay and how about question 4?
4. (Original post by AqsaMx)
Okay and how about question 4?
you need to work the total perimeter of the room (by adding all the sides together) then times that by the height of the walls (2.65 i think) and then subtract the area of the doors

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