An article is sold at a certain price. If it is sold at \(33\frac{1}{3}\%\) of this price, there is a loss of \(33{1\over3}\%\). What is the percentage profit or percentage loss when it is sold at 40% of the original selling price?
A alone can complete a work in 30 days while B alone can complete the same work in 20 days. In how many days both working together can complete the same work?
A merchant purchased 650 kg of wheat at ₹50 per kg. He sold 250 kg of it at a profit of 24% and 200 kg at a loss of 24%. At what rate per kg (in ₹) should he sell the remaining wheat to gain 20% on his initial investment?