Dimensions of the room are = 15 feet by 20 feet
The scale is given as = 5 feet = 2 inches
So, 15 feet = [tex]\frac{2}{5}\times15=6[/tex] inches
20 feet = [tex]\frac{2}{5}\times20=8[/tex] inches
Hence, length will be = 8 inches
Width will be = 6 inches