Question

Find the surface area of the square pyramid below if the length of the sides of the base are 9 cm, and the slant height is 12 cm.



Select one:
a. 243 cm2
b. 267 cm2
c. 201 cm2
d. 297 cm2

Answer 1

Answer:

Correct option is

A

340

Here, a=10cm and h=12cm

Surface area of square pyramid = Base area +

2

1

× Perimeter × Slant length

=a

2

+

2

1

×4a×l

=a

2

+2a×l

=(10)

2

+×2(10)×12

=100+240

=340cm

2