Practice questions on Your class

class Circle
  def initialize(radius)
    @radius = radius
  end
  def  getArea()
    return 3.14*@radius*@radius
  end
  def getCircumference()
    return @radius*2*3.14
  end
end

class Temprature
  def  convertFahrenhiet(celsius)
    return (celsius*(9/5))+32
  end
  def convertCelsius(farenhiet)
    return (farenhiet-32)*(5/9)
  end
end

class Student
  def initialize(name,roll)
    @name = name
    @roll= roll
  end
  def display()
    puts @name
    puts @roll
  end
  def setAge(age)
    @age=age
  end
  def setMarks(marks)
    @marks = marks
  end
end