Time taken by an object falling from rest to cover the height of \[{{h}_{1}}\] and \[{{h}_{2}}\] is respectively \[{{t}_{1}}\] and \[{{t}_{2}}\] then the ratio of \[{{t}_{1}}\] to \[{{t}_{2}}\] is [RPMT 1999; RPET 2002]

• A.             \[{{h}_{1}}\ :\ {{h}_{2}}\]  
• B.             \[\sqrt{{{h}_{1}}}\ :\ \sqrt{{{h}_{2}}}\]
• C.             \[{{h}_{1}}\ :\ 2{{h}_{2}}\]
• D.                      2h1 : h2