WASHINGTON, Oct. 6 (Xinhua) -- U.S. Treasury Secretary Timothy Geithner said Wednesday that effective "joint strategy" has made world economy stronger today and international economic cooperation is still needed to promote global growth.

"The most important policy question we confront together is how to strengthen the pace of growth and repair, and how to do so in a way that provides the basis for a more balanced and therefore more sustainable global economic recovery," Geithner said in a speech at Washington based think tank Brookings Institute in advance of upcoming global finance meetings.

"This is not a challenge that is best resolved by nations acting independently," he said.

Geithner said that "in the heat of the crisis, we all recognized that our actions would be more powerful if we acted together. Even though the most dangerous part of the crisis is behind us, we are still in a place where we can achieve better overall growth outcomes if we make policy in a cooperative framework."

Central bankers and Treasury ministers from around the world will attend International Monetary Fund and World Bank's 2010 annual meeting here in Washington later this week.