First, it have to change them so that they have common denominators. You would change the denominators to 6.
Your new fractions are:
4 2/6, 3 3/6, 3 5/6, 4 1/6.
Now you add them all together. When you add all of them, you end up with: 14 11/6. You would have to change this to 15 5/6.
Therefore, his average distance was 15 5/6 ( I think? ).
With ratio to get the same ratio but bigger or smaller numbers you should double the ratio or half it. Dont know if this was any help :)
So the hypotenuse is the ladder's length, which is 6m, and the base of the 'triangle' is 1.5m. Therefore, you do 6^2 - 1.5^2 = 36 - 2.25 = 33.75. Then, you just square root it to get 5.80948m. Hope this helps!
