Answer:
92 m/s
Explanation:
The speed of Airplane when observed from the ground is 203 m/s i.e., speed of Airplane when there is no wind = [tex]v_a[/tex]
The speed of the airplane relative to the air is 111 m/s = [tex]v_r[/tex]
This means that the airplane is moving against the current
Speed of the current with respect to the ground = [tex]v_c[/tex]
[tex]v_a-v_c=v_r\\\Rightarrow 203-v_c=111\\\Rightarrow v_c=203-111\\\Rightarrow v_c=92\ m/s[/tex]
Velocity of current has to be atleast 92 m/s