1.

5 liters of milk is drawn from a tank that has 50 liters of milk. The taken milk is replaced by water and the process is repeated 3 times. The mixture is sold at Rs. 100/L and cost price of milk is Rs. 100/L, then find the profit (In Rs.).1). Rs. 14552). Rs. 13553). Rs. 12554). Rs. 2000

Answer»

MILK left = Capacity X (1 – fraction of milk withdrawn)n, where n is the no of process

⇒ Milk left = 50 × (1 – 5/50)3 = 50 × (45/50)3 = 36.45 L

⇒ Total cost price = 36.45 × 100 = Rs. 3645

⇒ Total selling price = 50 × 100 = Rs. 5000

∴ Required profit = 5000 – 3645 = Rs. 1355


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