Question

Mr Joshi buys an estate for rs 34 lakh. He builds a boundary wall around it at a cost of rs 2 lakh. He sells two_fifths of it at a loss of 20% and one-third of it at a gain of 25%. At what gain per cent must he sell the remainder, so as to make a profit of 5% on the whole?

Answer 1

Total CP = 34 lakhs+ 2 lakhs = ₹3600000
2/5th CP= 2/5*3600000 = ₹1440000
SP on 2/5th part= 1440000-20/100*1440000= ₹1152000
1/3rd CP = 3600000*1/3 = ₹1200000
SP on 1/3rd part= 1200000+25/100*1200000=₹1500000
Total SP to gain 5% = 3600000+5/100*3600000=₹3780000
Remaining SP= 3780000-(1152000+1500000)=₹1128000

Answer 2

The solution for your query is mentioned in the below attached pictures.... Please check them out...

Hope they help. :)