We can make this expression to find out what 49% of 3120 and 2130:
49% * 3120
49/100 * 3120
152880/100
1528.8
49% of 2130
49/100 * 2130
104370/100
1043.7
A line that is tangent to each of the two coplanar circles
we don't know what the value of "X" is, so therefore, we cannot conclude that it is 15 cm.