'X' sells fruits at 21% profit. If X bought it for 9% less and sold it for Rs.29 less, he would have gained 25%. The cost price of fruits is?

Let the cost price of the fruits be 'C.P'

From the given data, after analysis it can be solved as

(121% of C.P) - (125% of 91% of C.P) = 29

$\frac{121}{100} C.P - \frac{125}{100 } x \frac{91}{100} x C.P = 29\frac{121}{100} - \frac{125 x 91}{100 x 100} C.P = 29(12100 - 125 x 91) C.P = 290000(12100 - 11375) C.P = 290000725 C.P = 290000C.P = 400$

Hence, the cost price of the fruits = Rs. 400.