If the operating cost of 6 burners for 6 hours in 8 days is Rs. 450 then find the number of burners if used for 5 hours for 10 day with operating cost of Rs.1250.
A shopkeeper bought 40 dozen eggs at Rs 1.40 each. 80 eggs were broken in transportation. He sold the remaining eggs at Rs 1.60 each. what is his profit or loss percent?