Question

On selling 21 plates of a popular dish at Rs 4200, there is a loss equal to the cost price of 7 plates. What is the cost price of a plate of the dish ?

Answer 1

Step-by-step explanation:

Let the Cost Price of each pot be Rs.x

So, Cost Price of 3 pots = Rs.3x

Hence, CP of 21 pots = Rs.21x

Selling Price of 21 pots = Rs.2520

From the given question, we get:

Loss = CP – SP

⇒ 3x = 21x – 2520

⇒ x = 140

∴ The Cost Price of each pot is Rs.140

Answer 2

The cost price of a plate of the dish is Rs 300 if On selling 21 plates of a popular dish at Rs 4200, there is a loss equal to the cost price of 7 plates

Given:

On selling 21 plates of a popular dish at Rs 4200, there is a loss equal to the cost price of 7 plates

To Find:

The cost price of a plate of the dish

Solution:

Let say cost price of a plate = Rs x

Cost price of 7 plates = Rs 7x

Cost price of 21 plates = Rs 21x

Loss = Cost Price - Selling Price

cost price of 7 plates = cost price of 21 plates - selling price of 21 plates

Hence

7x  = 21x  - 4200

=> 14x = 4200

=> x = 300

The cost price of a plate of the dish is Rs 300