Ahmed buys a plot of land for Rs. 480000. He sells of it at a loss of 6%. At what gain per cent should he sell the remaining part of the plot to gain 10% on the whole?

CP of plot = Rs.480000


SP of plot to gain 10%


SP =


= ((100 + 10) /100) × 480000


= Rs.528000


CP for 2/5 area of plot = 480000 × 2/5


= Rs.192000


SP of 2/5 area of plot will be


SP = ((100 – Loss %)/100) × CP


= ((100 - 6) / 100) × 192000


= Rs.180480


Difference between both the Selling Prices


= 528000 – 180480


= Rs.347520


CP for 3/5 land = 480000 – 192000


= Rs.288000


SP for 3/5 land = Rs.347520


Gain = SP - CP


= 347520 – 288000


= Rs.59520



= (59520 × 100) / 288000


= 20.66%


So, to gain 10% on whole remaining land should be sold at 20.66%.


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