Q is directly proportional to √p Q = 21 when p = 9, the value of Q when p = 81 is

Q is directly proportional to √p Q = 21 when p = 9, the value of Q

1.	Q is directly proportional to √p Q = 21 when p = 9, the value of Q when p = 81 is
A.	63
B.	64
C.	56
D.	67
Answer» B. 64