Answer:
54
Step-by-step explanation:

2r2+2r−24=0
Step 1: Factor left side of equation.
2(r−3)(r+4)=0
Step 2: Set factors equal to 0.
r−3=0 or r+4=0
r = 3 or r = −4
<h3>Surface area of rectangular prism is 220 square units</h3><h3>Volume of rectangular prism is 200 cubic units</h3>
<em><u>Solution:</u></em>
<em><u>The surface area of rectangular prism is given as:</u></em>
A = 2(wl + hl + hw)
Where,
l is the length
w is the width
h is the height
From given,
l = 10 units
w = 4 units
h = 5 units
<em><u>Substituting the values we get,</u></em>

A = 2(40 + 50 + 20)
A = 2(110)
A = 220
Thus surface area of rectangular prism is 220 square units
<h3><u>Volume of rectangular prism</u></h3>

Thus volume of rectangular prism is 200 cubic units
Choice a is the correct answer for the question