Respuesta :
Answer:
Total Surface Area of the given regular pyramid = 153 units²
Step-by-step explanation:
Base length of the regular pyramid, l = 9 units
Base width of the regular pyramid, w = 9 units
Height of the regular pyramid, h = 7 units
Perimeter of base = 3 × 9
= 27 units
[tex]\text{Area of base = }\frac{1}{\times Base\times Height\\\\Area = \frac{1}{2}\times 9\times 7=21.5\:\:units^2[/tex]
[tex]\text{Now, Total Surface Area = }\frac{1}{2}\times p\times l+A\\\\\implies\text{Total Surface Area = }\frac{1}{2}\times 27\times 9+31.5[/tex]
Hence, Total Surface Area of the given regular pyramid = 153 units²
