This is a common math problem. There are two ways to answer this question but both will give you the same answer. There is a misconception that this can also equal 40. If someone posts that the answer is 40, please let me know and I will explain why that is not actually the answer.
1+4=5 2+5=7
3+6=21
8+11=
These equations are actually:
1*(4+1)=52*(5+1)=7
3*(6+1)=21
8*(11+1)=96
Therefore:
8+11 = 96
Non of the above. The answer is 40 and I’m sticking to my guns !
Similar meaning you can assume they are proportionate and if every side is doubled then you should double the last. Another way is to use Pythagorean’s theorem and disregard the little triangle completely.
Both ways have me 40 !
It is false that the area of a person's yard can be measured in cubic feet. It is always measured in square feet, because cubic feet add another dimension, which is height, and height is not measured in a yard.