Question

2. Why is it necessary to drink about 1.5 litres of water every day? How would you show that
vegetables contain water?​

Answer 1

Answer:

It is necessary to drink about 1.5 litres of water every day to balance the amount of water lost (which is about 2–3 litres) from the body each day due to excretion, sweating and breathing. ... To show that vegetables contain water, take some vegetables and measure their weight.

Answer 2

ALL THESE POINTS WILL TELL US IF WE DRINK 1.5 litres water everyday

You excrete water all the time. ... You lose much more water in cooling the body in hot weather .We should also drink about 1.5 litres water everyday because the water lost as from the body each day due to excretion, sweating and breathing

How would you show that vegetables contain water?

If you keep vegetables in a dry pan, cover it with a lid or another plate and start heating the pan then after some time you can observe water vapour on the lid or on the plate that was used to cover the pan. This proves that vegetables have water in it.