Find the volume of the solid ligure . 7 ft 4 ft 5 ft 7 ft 11 ft 6 ft 11 ft 7 ft

Problem number 26 of the rhind papyrus says: find a quantity such that when it is added to of itself the result is a 15. the modern day equation that models this problem is x + x = 15. what is the solution to the equation? x = 10 x = 12 x = 15 x = 30