Answer:
<em>550ft²</em>
Step-by-step explanation:
<em>Since we are not given the dimension of the rectangular prism. Let us assume;</em>
Length of the rectangular base L = 10ft
Width of the rectangular base W = 15ft
height of the prism H = 5ft
Total surface area of the prism = 2(LW + WH + LH)
Substitute the given values
Total surface area of the prism = 2{10*15 + 15*5 + 10*5}
Total surface area of the prism = 2(150+75+50)
Total surface area of the prism = 2(275)
<em>Total surface area of the prism = 550ft²</em>
