Answer:
The tension on the string is
Step-by-step explanation:
From the question we are told that
The mass of the rock is

The density of the rock is
Generally the volume of the rock is mathematically evaluated as

substituting values


The volume of the rock immersed in water is
substituting values


mass of water been displaced by the this volume is
According to Archimedes principle
=>


The weight of the water displace is



The actual weight of the rock is

The tension on the string is
substituting values