297 cm is the total surface area of the square pyramid
122.5.
A=b x h/2. A=122.5 b=7
A x b=h
122.5 x 7 =122.5
Answer: 
Step-by-step explanation:
Given
Ladder is 16 ft from bottom and 12 away from the base of the wall
In another case ladder is 18 ft above the ground and let say x ft away from the base of the wall
In both the cases the length of ladder remains the same
Using Pythagoras theorem, we can write
