# Two water tanks of area 2 m 2 and 0.8 m 2 have a common partition wall. A circular orifice of…

Two water tanks of area 2 m2 and 0.8 m2

have a common partition wall. A circular orifice of diameter 10 cm allows flow

of water between the tanks. If initially the level of the water in the larger

tank is 1.5 m above that in the other, determine the time required for the

difference in water surface elevations to reduce to 0.5 m. The coefficient of

discharge of the orifice can be taken as 0.7.