Two numbers are in the ratio 3 : 4, if their H.C.F. is 4, then their L.C.M. = ?

Answer: Option A

Let number be = x, y
x : y = 3 : 4 (given)
H.C.F. = 4
∴ Number are = x = 4 × 3 = 12
y = 4 × 4 = 16
L.C.M. of (12, 16)
= 4 × 3 × 4
= 48