Rohan saves ₹ 80 from his pocket money every month. He will be able to save an estimated amount of ₹ 240 in three month.
Mrs Rane gives 0.025 part of her salary as pocket money to her son Vinod every month . Vinod spends 0.8 part of his pocket money and saves the rest . If he saves ₹277.50 in three months, how much does Mrs Rane earn in a month