1. I think it is objective, but not sure.
2. we, i know that one for sure.
Hope it helps! :)
Answer:
its c. 15 kg...
Explanation:
We know, according to archimedes principle,
Weight of Liquid displaced = Weight of body in air - Weight of body in liquid when immerse
so from that we get
Weight of body in liquid when immerse = Weight of body in air + Weight of Liquid displaced
relating to or having the form or character of a symphony.