A drop of water is divided in 27 equal droplets. If ΔP1 and ΔP2 be the excess pressures in the big drop and smaller droplet respectively, then ΔP1/ΔP2 is equal to
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a
2/3
b
1
c
3
d
1/3
answer is D.
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Detailed Solution
43πr3×27=43×R3⇒r=R3Now ΔP1=2SR and ΔP2=2Sr=2SR/3=3ΔP2∴ ΔP1ΔP2=13