Anickel has a mass of 5 grams there are 40 nickels in a roll of nickels what is the mass of the roll?

The answer is 200 grams because 40 x 5= 200

You have 2 sides that are 2 cms and you have 6 sides that are 1/2 cm and you have 4 sides that are 1 cm. the smallest sides are 1/2 the medium sized sides are 1 and the smallest are 1/2. so to find the perimeter you have to add them all up together so your answer will be 11 cm's