Question

Arianna has a large piece of fabric that she wants to use to make some scarves. The number N of scarves she can make is inversely proportional to the area A of each scarf. If the area of each scarf is 3 square feet, then she can make 15 scarves. If the area of each scarf is 5 square feet, how many scarves can she make?Arianna can make _____ scarves.

Answer 1

N is inversely proportional to A

so N*A=constant
N*A=3*15=45

if A becomes 5,N will be 45/5=9