If 15 workers can build a wall in 48 hours, how many workers will be required to do the same work in 30 hours?  Select the correct option:  A) 22  B) 24  C) 26  D) 25  E) 23

Rationale: let the number of workers employed to build the wall in 30 hours be y 48 * 15 = 30 * y ( 48 * 15 ) / 30 = y y = 24 answer : b
Answer: B