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Answer:

Let the C.P. be Rs. x.

Then, 900−x=2(x−450)

⇒900−x=2x−900

⇒3x=1800

⇒x=600

i.e., C.P. = Rs. 600, Profit =25 %

∴ S.P. of the article = Rs. (

100

600×125

)= Rs. 750.

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Answer:

Kumar's C.P. = ₹7500

Sam's C.P. = ₹7200

Step-by-step explanation:

Kumar's C.P. = 100/100+20 × 9000

= ₹7500

Sam's C.P. = 100-20/100 × 9000

= ₹7200