Question

Q:- 20 watches were sold at ₹ 10,200 and the profit was equal to the cost price of 4 watches. Find out the cost of each watch. (1) 407 (2) 440 (3) * 410 (4) 425 ​

Answer 1

Answer:

₹63.75

Step-by-step explanation:

No. of watches sold = 20

Total S.P of the watches = ₹10,200

Profit = C.P of 4 watches

SP - CP = Total CP / 4  

let cost price of one watch = x

10,200 - x = x / 4

x / 4 = 10,200 - x

x + x = 10,200/4

2x = 2,550

x = 2,550 / 2

x = 1,275

C.P of each watch = 1,275 / 20

                              =  ₹63.75

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Answer 2

Answer: 425

Step-by-step explanation:

SP of 20 watches =Rs.10,200

profit=cp of 4 watches

cp of each watch =?

SP-CP=CP/5 (profit = cp of 4 watches total cp is

of 20 watches)

let cost price of one watch =x

10,200=20x/5 +20x

10,200=4x+20x

24x=10,200

x=10,200/24

x=425