How+to+work+out+the+equations

Right rectangular prism
SA = 2lw + 2wh +2lh or 6s² To find the surface area of a right rectangular prism you need the lenght witch is 5, the width witch is 3, and the height witch is 7. SA = 2(5x3) + 2(3x7) + 2(5x7) The surface area will = 142u²