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Radii of two thin circular discs are 3cm...

Radii of two thin circular discs are 3cm and 4cm respectively. Both the discs are placed at the same depth under a liquid. The ratio of thrusts on them will be

A

A. `9:16`

B

B. 3:4

C

C. 4:3

D

D. `sqrt3:2`

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