A right triangle is revolved around the y axis. describe the solid of revolution

Polygon                    Axis of Rotation              Solid of Revolution

irregular pentagon    axis of symmetry             diamond-shaped solid

right triangle            hypotenuse       two cones with a common circular base

Step-by-step explanation:

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,