In this case, we'll have to carry out several steps to find the solution.
Step 01:
Data:
pyramid:
b = 5in
h = 10in
Step 02:
total surface area pyramid:
SA = 2hb + b²
SA = 2( 10in * 5in) + (5in)²
SA = 100in² + 25in²
SA = 125in²
The answer is:
SA = 125in²