Question

The force does water exert on the base of a house tank of base area 2.5m^2 when it is filled with water up to a height 2m

Answer 1

Area of base = 2.5 m square
h = 2m
thus volume = ar*h = 2.5*2 = 5 m cube
since density of water is 1000kg/m cube
therefore mass of the water = density * volume = 1000*5 = 5000 Kg
also Force = weight of water = m*g = 5000*10 = 50000 N
Probably it is correct