A square pyramid has a total surface area of eight hundred square feet. The area of the base is four hundred square feet. What is the area of one triangular face of the lateral surface?

A. 50ft

B. 100ft

C. 150ft

D. 200ft

Question

A square pyramid has a total surface area of eight hundred square feet. The area of the base is four hundred square feet. What is the area of one triangular face of the lateral surface? 

A. 50ft

B. 100ft

C. 150ft

D. 200ft

notamathgenius · Answer

A=2bs+b^2

mathstudent55 · Answer

How many triangular faces does a square pyramid have?

anonymous · Answer

800

anonymous · Answer

@mathstudent55 |dw:1363637717316:dw|

anonymous · Answer

the total surface area is 800
and base area =400
so area of 4 triangles = 800-400
so let each triangle b x
so 4x =400
x=100
ans. wil be 100

anonymous · Answer

got it?