Aspherical water tank holds 7500 ft^3. what is the diameter of the tank?

Acircular garden with radius of 8 feet is surrounded by a circular path with a width of 3 feet. what is the approximate area of the path alone? use 3.14 for π

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?

Car a and car b were in a race .the driver of car b claimed that his car was twice as fast as car a