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Question Number 131012 by mohammad17 last updated on 31/Jan/21

Commented by mohammad17 last updated on 31/Jan/21

$$helpmesir$$

Answered by mr W last updated on 31/Jan/21

Commented by mohammad17 last updated on 31/Jan/21

$$canyoucompletethesolutionsir$$

Commented by mr W last updated on 31/Jan/21

$$b=widthofgate=1.5m$$$$F_1=\frac{\rho {gbH}^2}{2}$$$$F_2=\rho gbHL$$$$thegatebeginstoopenwhen$$$$F_1\times \frac{H}{3}⩾F_2\times \frac{L}{2}$$$$\frac{\rho {gbH}^2}{2}\times \frac{H}{3}⩾\rho gbHL\times \frac{L}{2}$$$$\Rightarrow H⩾\sqrt{3}L=20\sqrt{3}\approx 34.6cm$$$$\Rightarrow h⩾100+34.6=134.6cm$$

Commented by mohammad17 last updated on 31/Jan/21

$$thankyousir$$

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