How to detect if a Humanoid is near by 2 of radius to another Humanoid?

Hi, since I'm making a TTT game I need to make a function that hide a player corpse in a barrel, already done that. This function is triggered if the player press E (ok) and if the player distance radius from the corpse is 2-3 but I don't know how!. This is the code in a LocalScript, which his Parent contains a ClickDetector to get the corpse, easy:

local player= game.Players.LocalPlayer
local mouse = player:GetMouse()
local pInfo = script.Parent.PlayerInfo.Wrapper
local target = script.Parent-- The corpse
local hid = false

function func_1637702a()
	-- hide the corpse (transparency => 0) and spawn barrel
end

function keyPress(par1)
	if par1 == "e" and hid == false then
		local td = player:FindFirstChild("TempData")
		local tp = td:FindFirstChild("Type")
		--if player radius position <= corpse radius position by 2 then
			if type.Value == "Traitor" then
				if pInfo.HealthStatus.Text == "Corpse" then
					func_1637702a()
					hid = true
				else
					print("The traitor tried to hide an alive player")
				end
			else
				print("A player tried to hide a corpse while not being a traitor")
			end
		--end
	end
end

mouse.KeyDown:connect(keyPress)

Thanks for helping me!

Here you go:

local player= game.Players.LocalPlayer
local mouse = player:GetMouse()
local pInfo = script.Parent.PlayerInfo.Wrapper
local target = script.Parent-- The corpse
local hid = false

function func_1637702a()
    -- hide the corpse (transparency => 0) and spawn barrel
end

function keyPress(par1)
    if par1 == "e" and hid == false then
        local td = player:FindFirstChild("TempData")
        local tp = td:FindFirstChild("Type")
        if (player.Character.Torso.Position-target.Torso.Position).magnitude <=  2 then
            if type.Value == "Traitor" then
                if pInfo.HealthStatus.Text == "Corpse" then
                    func_1637702a()
                    hid = true
                else
                    print("The traitor tried to hide an alive player")
                end
            else
                print("A player tried to hide a corpse while not being a traitor")
            end
        end
    end
end

mouse.KeyDown:connect(keyPress)

I might have located objects wrongly, but that should be easy to fix.

Edit: I guess I could tell something about what I did. So to find out distance between two positions, you can use roblox's vector3 utility function magnitude. Essentially, it returns the lenght of vector. Since we have 2 positions, we can get the vector in between by subtracting one vector from other. Now the lenght of that vector equals distance.