A right angled triangular laminar with height 3 m and base 4 m submerged in water at an inclination $30^{o}$ from 5 m below water surface. What is the total pressure on the laminar ?

218 kN

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235 kN

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243 kN

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265 kN

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Solution

The correct option is D 265 kN

C.G of plate from force surface, $¯ h = 5 - 1 s i n 30^{o} = 4.5 m$

Total pressure on the lamina = $γ A ¯ h$

$= 9.81 \times \frac{1}{2} \times (3 \times 4) \times 4.5 k N$

= 264. 9 kN

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A right angled triangular laminar with height 3 m and base 4 m submerged in water at an inclination 30o from 5 m below water surface. What is the total pressure on the laminar ?

The correct option is D 265 kN C.G of plate from force surface, ¯h=5−1sin30o=4.5 m Total pressure on the lamina = γA¯h =9.81×12×(3×4)×4.5 kN = 264. 9 kN

A right angled triangular laminar with height 3 m and base 4 m submerged in water at an inclination $30^{o}$ from 5 m below water surface. What is the total pressure on the laminar ?

The correct option is D 265 kN

C.G of plate from force surface, $¯ h = 5 - 1 s i n 30^{o} = 4.5 m$

Total pressure on the lamina = $γ A ¯ h$

$= 9.81 \times \frac{1}{2} \times (3 \times 4) \times 4.5 k N$

= 264. 9 kN