Question

The marked price ofa computer is 22,000. After allowing a 10% discount, a 7. dealer still makes a profit of 20%. Find the cost price of a computer.​

Answer 1

Answer:

The market price of the computer is Rs 22000

After 10% discount, its cost be

= Rs [22000 - (22000 × 10%)]

= Rs [22000 - (22000 × 10/100)]

= Rs (22000 - 2200)

= Rs 19800

Let us take the cost price of the computer be Rs x

The dealer made a profit of 20%

Then, its selling price was

= Rs [x + (x × 20%)]

= Rs [x + (x × 20/100)]

= Rs (x + x/5)

= Rs (6x/5)

By the given condition,

6x/5 = 19800

→ x = 19800 × 5/6

→ x = 16500

∴ the cost price of the.computer is Rs 16500

Answer 2

Answer:

let the cost price be c

The selling price:  

= 10% discount

= discounted price = 100%(marked price) - discount (10%) = 90%

                              = 90%/100%  × 22000

                              = 0.9 × 22000

                              =  rs. 19800

This discounted price is the selling price.

Therefore profit  = 19800 - C

% profit = profit/ cost price ×100%

             = 19800-c/ c ×100% = 20%

             = 100(19800-c)/c = 20

= 100(19800-c)/c = 20

 

             =   1980000 - 100c = 20c

             =  120c = 1980000

   

             =  c = 1980000/120

              c = Rs. 16500