Step-by-step Explanation: When dealing with ratios, there is always most likely a second number given to you. This number is going to be 1. When looking for n, you have to look for all of the numbers, in this case there is only two. 1 is the hour, so now you just need the 20 minutes. If the ratio is 1:n, this means that n would have to equal 20. 1:20
If we need sections that are 18 ft. long from available 78 ft. long line than we will divide 78/18 =4.(3) So we will get 4 sections that are 18 ft. long and we will have a remainder of 6 ft line not used.
