Answer:
a) 6.67 in.
Step-by-step explanation:
The aspect ratio of chalkboard =4:3 [length:width=4:3]
The width = 5 in.
the length = L
so,
4:3=L:5
⇒4/3 = L/5
⇒(4 x 5)/3= L
⇒20/3 = L
⇒ 6.67 = L
∴ The length of the chalkboard 6.67 in.
