Question

A right square pyramid is pictured below. if l is 15 cm and x is 18 cm, what is the surface area of the pyramid?

Answer 1

864

Explanation:

1st answer i got wrong,this one was right

Answer 2

The surface area of square pyramid is 953.64 cm² .

Explanation:

Given as for a square pyramid :

The height of pyramid = l = 15 cm

The base of square pyramid = x = 18 cm

Now,

The surface area of square Pyramid =
`b^(2) + 2b* \sqrt{(b^(2))/(4)+h^(2)}`

or , The surface area of square Pyramid =
`x^(2) + 2x* \sqrt{(x^(2))/(4)+l^(2)}`

Or, The surface area of square Pyramid =
`18^(2) + 36* \sqrt{(18^(2))/(4)+15^(2)}`

Or, The surface area of square Pyramid = 324 + 36 ×
`√(81 + 225)`

or, The surface area of square Pyramid = 324 + 36 × 17.49

Or , The surface area of square Pyramid = 324 + 629.64 = 953.64 cm²

Hence The surface area of square pyramid is 953.64 cm² . Answer