Answer:
C
Explanation:
you just have to find the surface area here. 2(2x10) = 40 this is the area of both the sides. then 2(15×10) = 300 this is the area of the top and the bottom. after that we will find the area of the the back and the front side which is 2(15×2) = 60. finally we will add them up. 40+300+60= 400 in^2. remember the surface area is 2(lw + wh + hl) where I is the length w is the width and h is the height