Answer : The correct option is, (a) 48 %
Explanation :
As we are given the efficiency of a spray chamber is, 95 %
Using unitary method :
If the efficiency of [tex]20\mu m[/tex] particles is 95 %
Then, the efficiency of [tex]10\mu m[/tex] particles will be = [tex]\frac{10\mu m}{20\mu m}\times 95\%=47.5\%\approx 48\%[/tex]
Therefore, the efficiency for [tex]10\mu m[/tex] particles is, 48 %
