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Find out pressure at points A and B also...


Find out pressure at points A and B also find angle `theta`

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Pressure at A-`P_(A)=P_(atm)-rhoglsintheta`
Pressure at B `P_(B)=P_(atm)+rho_(2)ghtheta`
But `P_(B)` is also equal to `P_(B)=P_(A)+rho_(3)glsintheta`
Hence `P_(atm)+rho_(2)gh=P_(A)+rho_(3)glsintheta`
`P_(atm)+rho_(2)gh=P_(atm)-rho_(1)glsintheta+rho_(3)glsintheta`
`sintheta=(rho_(2)h)/((rho_(3)-rho_(1))l)`
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