In a partnership, A and B start a business by investing ₹20,000 and ₹25,000 respectively. After 4 months, C joins them with ₹15,000. Find the ratio of their profits at the end of the year.
In a competitive exam, 70% of the candidates passed in English and 80% passed in Mathematics. If 10% failed in both subjects, what is the pass percentage in both subjects?
A boat can travel with a speed of 13 km/hr in still water. If the speed of the stream is 4 km/hr, find the time taken by the boat to go 68 km downstream.
A mixture contains milk and water in the ratio 5:2. If 4 litres of water is added, the ratio becomes 5:4. Find the initial quantity of milk in the mixture.