Please answer the question fast

1.	Please answer the question fast
Answer» HI there ! Here's the answer: •°•°•°•°•°<><><<><>><><>°•°•°•°•°• ¶ $Speed = \frac{Distance}{Time}$ => Distance = Speed × Time ¶ 1 m = 100 CM => 1 cm = 0.01 m ¶ SHAPE of pipe = Cylinder ¶ Volume of pipe = Volume of Cylinder = $v = Πr^{2}h$ ¶ $1 m^{3} = 1000\: litres$ ¶ 1 Hr = 60 min = 3600 SEC => $1 sec = \frac{1}{3600}Hrs$ •°•°•°•°•°<><><<><>><><>°•°•°•°•°• SOLUTION : Given, Internal Diameter of pipe = d = 7cm Internal Radius of pipe = r = $\frac{d}{2}$ => r= $\frac{7}{2}$ => r = 3.5 cm = 0.035 m Speed of water = 5 m/s Now, Height = h = Distance travelled by water in 60 sec => Height = speed × Time => h = 5 × 60 = 300 m Now, (i) The Volume of water that flows/discharged from the pipe in 1 min = $Πr^{2}h$ = $\frac{22}{7} × (0.035)^{2} × 300$ = $1.155 m^{3}$ Convert to Litres = $1155\: litres$ •°• The volume of water that flows from the pipe in 1 min = 1154 litres (ii) Given, For a rectangular TANK, Length = l = 4 m Breadth = b = 3m Height = h = 2.31 m Capacity of rectangular tank = length × breadth × height = 4 × 3 × 2.31 = $27.72 m^{3}$ Let the time taken by the pipe to full the tank be ' t ' sec we know that, The volume of water that flows from the pipe in 60 sec = 1154 litres Volume of water that flows from pipe in t sec = $\frac{1.155t}{60} = 0.01925t$ Now, According to the question, Volume of water that flows from pipe in t sec = 27.72 sec => 0.01925t = 27.72 => $t = \frac{27.72}{0.01925}$ => $t = 144000\: sec$ => $t = \frac{144000}{3600}hrs = 40\: hrs$ •°•°•°•°•°<><><<><>><><>°•°•°•°•°• Hope it helps