Final answer:
The error in finding the surface area of a composite solid can be corrected by using dimensionally consistent formulas for each part of the composite shape and summing them accurately.
Step-by-step explanation:
To correct the error in finding the surface area of a composite solid, we must ensure that the formulas used are dimensionally consistent. For instance, the correct formula for the volume of a cylinder, which appears to be related to part (a) of the given content, would be V = πr²h, where V is volume, π is the constant pi, r is the radius, and h is the height of the cylinder. Similarly, the formula for the surface area of a cylinder, possibly related to part (b), is A = 2πr² + 2πrh, where A represents surface area. When calculating the surface area of a composite solid, each part of the composite shape must be calculated separately and then summed together to find the total surface area. Without a specific example of the composite solid and the calculations made, it's difficult to identify the precise error, but the key to correcting it lies in using the appropriate formulas and adding all the individual areas correctly.