Two persons move on a rectangle

There is a ground of a rectangle as shown in a figure.

Taro and Jiro left A point at the same time and Taro walked to B point and Jiro walked to E point, respectively.

When they walked with the same speed, they arrived at B point and E point at the same time.

Jiro who arrived at E point turned to the right so that Taro might be seen to the front.

Find the angle at which Jiro turned to the right.

Answer