`h = sqrt((K_(w))/(K_(A).C))`
प्रश्नानुसार , `h = 2.77 xx 10^(-2), K_(A) = 1.3 xx 10^(-9), C = 10^(-2)`
`:. 2.77 xx 10^(-2) = sqrt((K_(w))/(1.3 xx 10^(-9) xx 10^(-2)))`
या `(K_(w))/(1.3 xx 10^(-11)) = (2.77 xx 10^(-2))^(2) = 7.67 xx 10^(-4)`
या `K_(w) = 7.67 xx 10^(-4) xx 1.3 xx 10^(-11)`
`= 9.971 xx 10^(-15)`.