Answers

2016-01-26T21:22:45+05:30
It should be sold at Rs.750

Cost of article without any profit or loss is 600 as
loss for selling article at Rs.450 is 150 and
profit after selling it at Rs.900 is 900-600=300 i,e double of 150.

And 25% of 600 is 25/100*600=150

So, Cost of article with 25% profit is 600+150 
                                                               = 750
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2016-01-26T22:56:51+05:30
Let C.P. = x Profit = 2(Loss) => 900 - x = 2 (x - 450) => 900 - x = 2x - 900 => 3x = 1800 => x = 600 C.P. = 600 Profit = 25% S.P. = 125*600/100 S.P. = 750
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