1. ## total differential apprximation

The specific volume v of a compressible fluid flowing through a section area A with mean velocity V is given by"

v=kAV

where k is a constant. If v decreases by 5% and A increases by 4%, then estimate the percentage increase in V

Thank you!

2. ## Re: total differential apprximation

What have you tried?

3. ## Re: total differential apprximation

ive tried to do partial differentiation with dV/dr and dV/dA, but i don't know how to get rid of the k