6) A shopkeeper sold an electric iron at 10% profit. Had he sold an iron at 20% profit, he would have gain rs.%) more. The cost price of the fan was:

Cost price is to be determined so

Let the cost price= x
Then 10 percent of it will be x * 10% = x * 10/100 = x* 0.1= .1x
So the price with 10% profit will be= cost price + Profit = x+ .1x

similarly the price with 20% profit on cost price will be= x + .2x

Then given condition tells that when sold at 20% profit shopkeaper gets 96 more than selling at 10 % profit.( I think I've taken 96 value by myself as it's not given in question)

So we have
Price with 20% profit = Price with 10% profit +96
=> x+.2x=x+.1x+96
=>.1x=96
=> x=960

If he had written value with capslock on then %) will be 50 then answer will be 500.