The figure is a square based pyramid. Total surface area of the pyramid is 9072m³. If the length of the side of the square base is 56 cm , find the volume of the pyramid. Help!! :)

The volume of the pyramid=47040

Solution Given:

The total surface area of the pyramid =

let the height be AB be h.

length of side[l]=56 m

The volume of the pyramid=?

let slant height be AC=a.

and BC=b

we have,

The perimeter of base[P]=4l=4*56=224m

BC=28m

Now;

The total surface area of the pyramid =

lateral= surface area +base area=

now

By using Pythagoras law;

h=45m

now,

The volume  of the pyramid=

Step-by-step explanation:

50-60=10

step-by-step explanation:

e^-kt = n/n0 = 0.79  

-kt = ln 0.79  

t = - ln 0.79/0.0001  

= 2357 years

step-by-step explanation: