The retail price of a water geyser is ₹11,300. If the manufacturer gains 5%, the wholesale dealer gains 10% and the retailer gains 15%, then find the cost price of the water geyser (rounded off to two decimal places.)
(Note: Manufacturer sells to wholesaler, wholesaler sells to retailer and retailer sells to customer.)​

Correct option is B

Given:

Retail price of the water geyser = ₹11,300

Manufacturer gains 5%

Wholesale dealer gains 10%

Retailer gains 15%

Formula Used:

Selling price = $$\text{Cost price} \times \left(1 + \frac{\text{Profit percentage}}{100}\right)$$​​

Solution:

Let the cost price for the retailer be x

So, 

​$$x \times \frac{105}{100}\times \frac{110}{100}\times \frac{115}{100} = 11300 \\ \ \\ \implies x = 11300\times \frac{100}{105}\times \frac{100}{110}\times \frac{100}{115} \\ \ \\ = ₹8,507.43$$​​