In Z Square Mall in Kanpur, there is a space to keep 300 cars and the entry fees per car is ₹ 20…

In Z Square Mall in Kanpur, there is a space to keep 300 cars and the entry fees per car is ₹ 20. It is estimated that if the entry fee is decreased by ₹ 5, then 50 additional cars can be adjusted in the same parking. Justify that the Marginal Revenue (MR) decreases at a higher rate than the Average Revenue (AR).