I have some problem when i want start program. What should I do to fix

this problem?

D:/2.rb:7: parse error, unexpected kEND, expecting $

r=10

R=20

h=30

def my_l = l(h, R, r)

Math.sqrt(h**2+(R-r)**2)

end # <= Here problem

def my_s = s(l, R, r)

Math::PI*3(R+r)+Math::PI(R**2+r**2)

end

def my_v = v(h, r, R)

Math::PI*h/3(R 2+r2+R*r))

end

puts l(10, 20, 30)

puts v(30, 10, 20)

puts s(my_l, 20, 10)