Chapter 10 - Radical Expressions and Equations - 10-3 Operations with Radial Expressions - Practice and Problem-Solving Exercises - Page 617: 56

$r_{1}/r_{2} =\sqrt {10}/2$

$r_{1}/r_{2} =\sqrt {m_{2}}/\sqrt {m_{1}}$ $r_{1}/r_{2} =\sqrt {30}/\sqrt {12}$ $r_{1}/r_{2} =\sqrt {30}*\sqrt {12}/\sqrt {12}*\sqrt {12}$ $r_{1}/r_{2} =\sqrt {360}/12$ $r_{1}/r_{2} =\sqrt {6*6*10}/12$ $r_{1}/r_{2} =6*\sqrt {10}/12$ $r_{1}/r_{2} =6/12 * \sqrt {10}$ $r_{1}/r_{2} =1/2 * \sqrt {10}$ $r_{1}/r_{2} =\sqrt {10}/2$