Let the capacity of each of the equal glass = x litre Each glass containing x∕3l and x∕4l of milk. The quantities of milk in first and the second glasses were
x
3
and
x
4
respectively =(
x
3
+
x
4
)=
4x+3x
12
=
7x
12
l So, the quantities of water in the first and the second glasses were =(x−