Answer:
option b
Step-by-step explanation:
since the aspect ratio of a rectangular shape is length/width
given , aspect ratio of chalkboard = 4:3
therefore let length = 4x and width = 3x
since width is given = 7 inches
ie 3x =7
x = 7/ 3
therefore length = 4*7/3 = 28/3 = 9.333in
hope it helps..
