If shingles are 5 inches wide, how many shingles are needed for a 10-foot-long row?

To determine how many shingles are needed for a 10-foot-long row when each shingle is 5 inches wide, first, it's important to convert the length of the row from feet to inches. Since 1 foot equals 12 inches, a 10-foot row is equal to:

10 feet × 12 inches/foot = 120 inches.

Next, we need to calculate how many shingles fit into this 120-inch length. Given that each shingle is 5 inches wide, we divide the total length of the row by the width of each shingle:

120 inches ÷ 5 inches/shingle = 24 shingles.

Thus, the correct answer is that 24 shingles are needed for the 10-foot-long row. This answer is validated by ensuring that each shingle's contribution to the total length is accurately accounted for in the calculation.