Question

Suppose that 15 inches of wire costs 90 cents. At the same rate, how many inches of wire can be bought for 72 cents?

Answer 1

• 12 inches

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15 inches of wire costs 90 cents, then 1 inch of wire costs:

• 90/15 = 6 cents

The length of wire for 72 cents:

• 72/6 = 12 inches