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Rohan and Karan together take 9/2 days.
Time taken by Karan alone to complete the task =1/[(2/9) - (1/18)] = 1/(4/18) = 18/4 = 9/2
By selling 36 m of jute, a shopkeeper gains an amount equal to the selling price of 12 m of jute. Find the gain percentage.
What is the equivalent single discount percentage for two successive discounts of 20% and 10%?
A shopkeeper marks an item at ₹800 and offers a 20% discount. He still makes a profit of 25%. What is the cost price of the item?