Hey there! :)
The formula for finding volume of a cone : ( π · r² · h ) ÷ 3
Radius = 6
6² = 6 · 6 = 36
Height = 8
π = 3.14
Multiply:
8 × 6 × 3.14 = 150.72
The volume is 150.72 cubic meters
Hope this helps :)
Cos x = 5 / 9 ==》 Cos x = 0.55
==》 x = 56 degrees
84/21 = 4 20 * 4 = 80 So the base edge of the second pyramid is 80. Hope this helps :)
