Question

pipe of radius 0.6 cm discharges petrol at a rate of 2.45m/s.find the volume of petrol discharged in 3 minutes , giving your answer in litres.

Answer 1

Answer: 498.5 litres

Step-by-step explanation:

r = 0.6 cm = 0.006 m = 6 x $10^{-3}$ m

speed = 2.45 m/s

time = 3 min = 180 sec

volume = speed x area x time

            =  2.45 x $\pi r^2$ x 180

            = 2.45 x 3.14 x (6 x $10^{-3}$)(6 x $10^{-3}$)x 180

            = 498500.64 x $10^{-6$

            = 0.4985 $m^3$

            = 0.4985 x 1000 litres

            = 498.5 litres