Examples 1. Calculate the value of A: of a sample of 2.36 in. height and 7.75 in2 cross-sectional area, if a quantity of water of 26.33 in3 flows down in 10 min under an effective constant head of 15.75 in. On oven drying, the test specimen weighed 1.1 lb. Assuming Gs = 2.65, calculate the seepage velocity of water during the test.​