Answer:
Please who knows the full question to this problem am unable to see the full question.....
Volume varies 1/P.
V=K/P.
21=K/1.
K=21.
The relation is V=21/P.
....if P=0.7 and K=21.
and the relation to solve the question is V=21/P then put the value of P in the formula which will be...
V=21/0.7.
V=30m^3.
This is my answer..i hope it helps