The cones below are similar, although not drawn to scale. what is the length of the radius of cone b?
cone a = radius is 5 and height is 15 ft
cone b = radius is unknown and height is 18 ft
a) 5 ft
b) 6 ft
c) 7 ft
d) 8 ft

the answer is:

the lateral area is equal to

to find the lateral area of the square pyramid, first we need to find the perimeter of the base, and then, find the lateral area using the following formulas:

where,

s, is the base length

slant height, is the height of a the side of the pyramid

we are given:

now, calculating the perimeter of the base, we have:

then, calculating the lateral area:

hence, we have that the lateral area is equal to

have a nice day!