Answer:
The length of the sides is <u>7 In</u>.
Step-by-step explanation:
Given:
A cube has a surface area of 294 sq. In.
Now, to find the sides.
Let the side be 
Putting the formula of area to get the length of side:


<em>Dividing both sides by 6 we get:</em>

<em>Using square root on both sides we get:</em>

Side = 7 In.
Therefore, the length of the sides is <u>7 In</u>.