Taro, Jiro and Hanako continue running around the surroundings of a pond with a fixed speed, respectively.
Taro and Jiro run in the same direction and Hanako runs in an opposite direction.
Taro passes Jiro every 15 minutes and Jiro meets with Hanako every 2 minutes.
Hanako runs in 8 minutes the distance where Jiro runs in 7 minutes.
Find the ratio of the speed of Taro and Hanako in this case.