Numerical :
Given : `v_(w)-v_(g)=2.7xx10^(7)"m"//"s",mu_(g)=1.5,mu_(w)=1.333.`
`v_(w)=(c)/(mu_(w))`
`implies" "=(c)/(1.333)`
Again, `" "v_(g)=(c)/(mu_(g))`
`implies" "=(c)/(1.5)`
`:." "v_(w)-v_(g)=(c)/(mu_(w))-(c)/(mu_(g))`
`implies" "=c[(1)/(1.333)-(1)/(1.5)]`
`implies" "2.7xx10^(7)=c[(1.5-1.333)/(1.5xx1.333)]`
`implies" "c=323272455.1=3.23xx10^(8)"m"//"s".`