The mass tells you the amount of matter or substance that makes up an object.
The weight tells you the measure of the matter.
The volume tells you the amount of space/size taken up
Answer:
= 40 cm
Explanation:
given data
string length = 30 cm
solution
we take here equation of length that is
L =
...............1
so
total length will be here


so
will be

= 40 cm