Determining the Cost of 5 Pencils Based on Given Pricing Information

In this article, we will explore how to determine the cost of 5 pencils based on the given pricing information for 3 pencils. We will consider different approaches and scenarios to help you understand cost calculations and scaling during the purchase of multiple items.

Approach 1: Direct Calculation

Let's assume that the cost of 3 pencils is Rs 7. If we want to find the cost of 1 pencil, we divide the total cost by the number of pencils:

1 pencil costs: Rs (frac{7}{3}) (approx) Rs 2.33)

Now, to find the cost of 5 pencils, we multiply the unit cost by the number of pencils:

5 pencils cost: Rs 5 times frac{7}{3} (approx) Rs 11.65)

Approach 2: Scaling Factor Method

A retailer might scale the pricing based on the number of pencils purchased. To find the scaling factor between the 3 pencils and 5 pencils:

Scaling factor (frac{5}{3} approx 1.66666)

We then multiply the total cost of 3 pencils by this factor:

Cost of 5 pencils: Rs 7 times frac{5}{3} (approx) Rs 11.67)

Approach 3: Detailed Calculation and Rounding

For a more detailed calculation, we can convert the division into a fraction and perform the multiplication:

Cost of 5 pencils: 5 times frac{7}{3} frac{35}{3} ( 11 frac{2}{3})

Rounding to two decimal places, the cost is approximately Rs 11.67.

Conclusion

When solving for the cost of more pencils, it's important to consider whether the pricing scales based on the quantity purchased. If not, the cost of 5 pencils from 3 pencils costing Rs 7 would be calculated directly to be approximately Rs 11.67.

Related Topics

Unit Cost Calculation: Understanding how to calculate the unit cost is crucial for financial planning in both personal and business settings.

Pricing Scaling: Knowing how pricing scales can help in making informed decisions when purchasing multiple items.