cost of rolls of string for kite

Question

Aaron needs 12.5 meters of string to make a kite.  If one roll of string holds 100 centimeters and costs $2.10, what is the total cost of the rolls of string that Aaron needs to buy?

Answer 1

100 centimeters  = 1 meter

 

We need 12.5 meters, so we need to buy 13 rolls of string:

 

13 x 2.10 = $27.30