Explanation

Divide the ﬂoor space into two rectangles by drawing a line segment. The area of the large rectangle \(=20 \times 15=300 \mathrm{sq} . \mathrm{ft}\). The area of the small rectangle \(=10 \times 15=150 \mathrm{sq} . \mathrm{ft}\) The total area of ﬂoor space = 150+300 = 450 sq. ft. Since 9 sq. ft. = 1 sq. yd., \(450 \text { sq. ft. } \div 9=50 \text { sq. yd. }\)

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