Question 1091317
The profit on the first house is 15%, so its selling price is 20000*1.15 = 23000
On the entire transaction, John loses 1800, thus the total for both houses is: 
23000 + P = 40000 - 1800, where P = the selling price of the second house
Solve for P:
P = 38200 - 23000 = 15200
Ans: 15200 Rs