Question

A salt shaker is shaped like a square pyramid. The perimeter of the base is 16cm, the height of the salt shaker is 20cm, and the slant height is about 10.2cm. Select values to label the net below with the correct dimensions.

What is the surface are of the salt shaker?

Answer 1

97.6 square cm

Explanation:

We are given that

Perimeter of base=16 cm

Height of salt shaker,h=20 cm

Slant height of salt shaker,l=10.2 cm

Perimeter of base,P=4(length of side of base)

`16=4a`

`a=(16)/(4)=4 cm`

Surface area of square pyramid=
`a^2+2al`

Using the formula

Surface area of square pyramid=
`4^2+2* 4* 10.2`

Surface area of square pyramid=
`16+81.6`

Surface area of square pyramid=97.6 square cm