Answer:
15 cm by 12 cm.
Step-by-step explanation:
Given:
Amanda uses a rectangular canvas for a panting.
The length is
centimeters.
The width is
centimeters, and is 4/5 of the length .
Question asked:
.What are the dimensions of the canvas ?
Solution:
<u>As given that the width is </u>
of the length.

Adding both sides by 

Subtracting both sides by 

By cross multiplication:-

By diving both sides by 70

<u>Now, substituting the value:-</u>
The length =
cm
= 
The width =
cm
= 
Thus, length and width of canvas are 15 cm and 12 cm.