Question

why do we need more water than our food and as sciencetest also say 70percent of our body is made up of water and food give us energy so we should much have it much or not

Answer 1

You need both in sufficient quatities to survie and live a happy life.
But as we need the nutrients from food to reach each and every part of the body, we need blood which is mostly water.
so we need water for transport.