how many kitres of water should 1 and half year old baby drink. because he is mostly of times constipated

A. dear total fluid required about 1.3 lt daily this includes not only water but also water from food and breastmilk include fibrous food like variety of seasonal vegetables, green leafy vegetables and fruits, carrot cucumber , beetroot, papaya, apple, peach banana, prunes whole fruit is better than fruit juice grated and soaked dry fruits Like black currant , prunes, date , figs, nuts like almond, walnut give whole grains like daliya, whole pulses, beans, sprouts avoid refined grains, biscuits and frequent use of bread