number of rolls needed = 3
Explanation:length of lot = 13.5 ft
width of lot = 47.75 ft
Since the man is putting a fence round, we would find the perimter of the lot:
perimeter of rectangle = 2(length + width)
perimeter of rectangle = 2(13.5 + 47.75) = 2(61.25)
perimeter of rectangle = 122.5ft
Length of rolls = 50 ft
Number of rolls needed = perimeter of rectangle/length of rolls
Number of rolls needed = 122.5/50 = 2.45
To the nearest whole number, number of rolls needed = 3
