Ratio of lemon to water to be mixed to prepare lemon juice is 3:5. For 12 lemons the number of cups ofwater to be used is
5 litres of water was mixed with 2 litres of lemon juice to make lemonade for a gathering. To make it tastier, if the quantity of lemon juice is tripled and that of water is doubled, find the new ratio between water and lemon juice.