Question

Find the surface area of a square pyramid with a length of 5 cm and a slant height of 8cm.

find the volume of a cone with a radius of 5 ft and a height of 12 ft.

Answer 1

that top 1 is correct

Explanation:

Answer 2

area of the square base = 5^2 = 25 cm^2
Area of one of the triangular side = 1/2 * 5 * 8 = 20 cm^2 and there are 4 sides
So the surface area of while pyramid = 4 * 20 + 25 = 105 cm^2

Volume of the cone = (1/3) pi r^2 h
= (1/3) pi * 5^2 * 8
= 209.44 ft^2