Will give brainliest to best and quick helper!

Answer:
v= b*h*w
v = 10*x*5
v = 250
50x = 250
x = 5
The answer is 5 or the second option or B.
Answer:
The volume of rectangular box is calculated by:
V = base area x height = length x width x height
=> x = width = V/(length x height)
=> x = 250/(10 x 5) = 250/50 =5 in
=> Missing side: 5 in
Hope this helps!
:)