A triangular plate with height 6 ft and a base of 9 ft is submerged vertically in water so that the top is 2 ft below the surface. Express the hydrostatic force against one side of the plate as an integral and evaluate it. (Recall that the weight density of water is 62.5 lb/ft3.)

x = -4

step-by-step explanation:

- 20 - 4(x + 3) = 4x

=> -20 - 4x - 12 = 4x

=> - 32 -4x = 4x

=> -32 = 4x + 4x

=> - 32 = 8x

=> -32/8 = x

=> -4 = x

the surface area is 124cm²

step-by-step explanation:

length: 4cm

width: 9cm

height:   2cm

but which class are u may know that first

b). 4320 have a nice day