TF is a tower with F on the ground The angle of elevation of T from A is x deg such that tan x deg 2...........

TF is a tower with F on the ground. The angle of elevation of T from A is x° such that tan x°= 2/5 and AF = 200 m. The angle of elevation of T from a nearer point B is y° with BF = 80 m. The value of y° is-