Question 19 of 47intermediate🔧 ApplyNumerical3 marks

The family regularly composts the collected waste. They get around 150 kg of compost each year, which they use in their garden. 1 kg of compost is often sold in the market at ₹24. By creating their own compost, how much money have they saved in a year?

Correct Answer

Given: Compost produced = 150 kg Market price = ₹24 per kg

Formula: Savings = Quantity × Rate

Calculation: Savings = 150×24150 \times 24 = (100 + 50) × 24 = 100×24100 \times 24 + 50×2450 \times 24 = 2400 + 1200 = 3600

Answer: The family saves ₹3,600 in a year.

Exercise: Waste and Composting | Q: 2 | (Page Page 9)
For More Understanding

Explanation

The chapter shows the calculation: Savings = 150 kg × ₹24 per kg = ₹3,600. Using the grid method: 150×24150 \times 24 = (100 + 50) × 24 = 2400 + 1200 = 3600.

Solution Steps

  1. Identify the quantity of compost (150 kg) and market price (₹24 per kg).

  2. Apply the formula: Savings = Quantity × Rate.

  3. Substitute values: Savings = 150×24150 \times 24.

  4. Use the grid method: 150×24150 \times 24 = (100 + 50) × 24.

  5. Calculate: 100×24100 \times 24 = 2400 and 50×2450 \times 24 = 1200.

  6. Add the partial products: 2400 + 1200 = 3600.

  7. Conclude: The family saves ₹3,600 in a year.

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