Initially its moving with tail wind so here the speed of wind will support the motion of the plane
so we can say



now when its moving with head wind we can say that wind is opposite to the motion of the plane



now by using above two equations we can find speed of palne as well as speed of wind


Answer:
The energy flows between the ice and the tea equally. The table below shows the temperatures of several different objects made of the same material.
It was about 9:30 p.m. sorry if the answer is wrong