A cube and a square pyramid were joined to form the composite solid.
What is the total surface area of the composite solid?
792 square inches
936 square inches
1,080 square inches
1,152 square inches
we know that total surface area of the composite solid=surface area of the pyramid+surface area of the cube
surface area of the pyramid=4*area of lateral triangle side area of lateral triangle side=12*9/2----> 54 in² surface area of the pyramid=4*54---> 216 in²
surface area of the cube=5*[12*12]----> 720 in²
total surface area of the composite solid=216 in²+720 in²---> 936 in²
