Respuesta :
Total surface area of the rectangular pyramid is equals to 108.6cm².
What is rectangular pyramid?
" Rectangular pyramid is a three dimensional geometrical shape with rectangular base and four triangle joined at a point."
Formula used
Total surface area of rectangular pyramid
= area of the base + area of each lateral face
According to the question,
Area of two triangular face = 7.8 +7.8
= 15.6 cm²
Area of other two triangular face = 16 .5 +16.5
= 33 cm²
Area of base = 60cm²
Substitute the value in the formula we get,
Total surface area of the rectangular pyramid = 15.6 + 33 + 60
= 108.6 cm²
Hence, total surface area of the rectangular pyramid is equals to 108.6cm².
Learn more about rectangular pyramid here
https://brainly.com/question/12449923
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