Question

you purchase a 50-meter roll of fencing, at a cost of $14.95 per meter, in order to build a dog run that is 340 cm wide and 1380 cm long. After you cut the four pieces of fencing from the roll, how much fencing is left on the roll?

Answer 1

Do you know how to convert cm to m? Once you've done that, you can subtract what you used (rectangular perimeter = 2L+2W) from the total you bought.

Also, the cost per meter isn't needed for this question.