Question:medium

Amal buys 110kg of syrup and 120kg of juice, syrup being 20% less costly than juice, per kg. He sells 10kg of syrup at 10% profit and 20kg of juice at 20% profit. Mixing the remaining juice and syrup, Amal sells the mixture at ₹ 308.32 per kg and makes an overall profit of 64%. Then, Amal's cost price for syrup, in rupees per kg, is

Updated On: Jan 15, 2026
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Correct Answer: 160

Solution and Explanation

Step 1: Given Information

Amal's purchases:

  • 110 kg of syrup
  • 120 kg of juice

The cost price of syrup is 20% less than the cost price of juice.

Step 2: Assume Cost Prices

Let the cost price (CP) of 1 kg of juice be \( 10 \text{ CP} \). Since syrup is 20% less expensive:

Cost price of 1 kg syrup = \( 10 - 0.20 \times 10 = 8 \text{ CP} \)

Step 3: Selling Part of Syrup and Juice

Amal sells:

  • 10 kg of syrup at a 10% profit
  • 20 kg of juice at a 20% profit

Selling price of 10 kg syrup: \( 10 \times 8 \times 1.1 = 88 \text{ CP} \)

Selling price of 20 kg juice: \( 20 \times 10 \times 1.2 = 240 \text{ CP} \)

 

Step 4: Selling the Remaining Mixture

Remaining quantity = \( (110 + 120) - (10 + 20) = 200 \text{ kg} \)

Selling price per kg = ₹308.32

Total selling price of mixture: \( 308.32 \times 200 = 61664 \text{ CP} \)

Step 5: Total Cost Price and Profit

Total cost price: \( (110 \times 8) + (120 \times 10) = 880 + 1200 = 2080 \text{ CP} \)

Given overall profit = 64%

Total selling price = \( 2080 \times \frac{100 + 64}{100} = 2080 \times 1.64 = 3411.20 \text{ CP} \)

Calculated selling price = \( 88 + 240 + 61664 = 61992 \text{ CP} \)

Equating the total selling price to find the value of 1 CP unit:

\( 61992 \text{ CP} = 2080 \times 1.64 \text{ CP} \implies \text{CP unit} = ₹20 \)

Step 6: Find Cost Price of Syrup

Cost price of syrup per kg: \( 8 \times \text{CP unit} = 8 \times 20 = \boxed{₹160} \)

Final Answer:

Cost price of syrup = ₹160 per kg

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