pyq/2017/csat/54

P works thrice as fast as Q, whereas P and Q together can work four times as fast as R. If P, Q, and R together work on a job, in what ratio should they share the earnings?

(A) 3 : 1 : 1

(B) 3 : 2 : 4

(C) 4 : 3 : 4

(D) 3 : 1 : 4