P, Q and R are three typists who working simultaneously can type 216 pages in 4 hours. In one hour, R can type as many pages more than Q as Q can type more than P. During a period of five hours, R can type as many pages as P can during seven hours. How many pages does each of them type per hour ?

P, Q and R are three typists who working simultaneously can type 216 p

1.	P, Q and R are three typists who working simultaneously can type 216 pages in 4 hours. In one hour, R can type as many pages more than Q as Q can type more than P. During a period of five hours, R can type as many pages as P can during seven hours. How many pages does each of them type per hour ?
A.	4, 17, 20
B.	5, 17, 22
C.	5, 18, 21
D.	6, 18, 22
Answer» D. 6, 18, 22