1.

A circle C_1 with diameter 1//25 cm is tangent to X-axis at (2//5, 0) and the other circle with diameter 1//49 cm is tangent to X-axis at (3//7, 0). Moreover, these two circles are on the same side of X-axis and tangent to each other. There is another circle C_3 which is tangent to both of these circles and tangent to X-axis. Find, the distance between the Y-axis and the point of tangent of the circle C_3 on X-axis.

Answer»

26/35
57/144
17/36
35/84

Answer :D


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