Dam and sluice gate can be used to prevent some locations from flood. In this case, the

low of water from a reservoir is controlled by a $1\mathrm{.}5$ m wide L$-$shape gate hinged at point

A$,$ as shown in Figure $2.$ If it is desired that the gate open when the water height is $3\mathrm{.}6$

m$,$ determine the required mass W$.$ Use pwater $=1000$ kg$/$m$3.$ What would be the

depth of the fluid, h$,$ if the water is changed to oil with density of Potl $=880$ kg$/$m$^3$

using the same value of mass W obtained$$previously$.$