1. If a : b = 5 : 9 and b : c = 4: 7, find a : b : c.
2. Divide Rs. 672 in the ratio 5 : 3.
3. Divide Rs. 1162 among A, B, C in the ratio 35 : 28 : 20.
4. A bag contains 50 p, 25 P and 10 p coins in the ratio 5: 9: 4, amounting to Rs. 206. Find the number of coins of each type.
5. A mixture contains alcohol and water in the ratio 4 : 3. If 5 litres of water is added to the mixture, the ratio becomes 4: 5. Find the quantity of alcohol in the given mixture