An ideal fluids flows through a pipe of circular cross -section made of two sections with diameters 2.5 cm and 3.75cm .The ratio of the velocities in the two pipes is ……

An ideal fluids flows through a pipe of circular cross -section made o

1.	An ideal fluids flows through a pipe of circular cross -section made of two sections with diameters 2.5 cm and 3.75cm .The ratio of the velocities in the two pipes is ……
Answer» `9:4` `3:2` `sqrt(3):sqrt(2)` `sqrt(2):sqrt(3)` Solution : According to equation of CONTINUITY , `A_(1)v_(1)=A_(2)v_(2)` `thereforepir_(1)^(2)v_(1)=A_(2)v_(2)` `therefore(v_(1))/(v_(2))=((r_(2))/(r_(1)))^(2)` `therefore(v_(1))/(v_(2))=((3.75cancel2)/(2.5cancel2))^(2)` `therefore(v_(1))/(v_(2))=(9)/(4)(9:4)`