Given Mr. Virmani spent to purchase the house = Rs. 365000
Amount he spent on repair = Rs. 135000
Total amount he spent on the house (CP) = Rs. (365000 + 135000)
= Rs. 500000
Given SP of the house = Rs. 550000
Gain = SP – CP
= Rs. (550000 – 500000)
= Rs. 50000
Gain % = (Gain/CP) x 100
= (50000/500000) x 100
= 5000000/500000
Gain = 10%