Question

Water flows through a cylindrical pipe of internal diameter 7cm at 5 metre per second. Calculate the volume, in litres, of water discharged by the pipe in one minute,

• A. 1255
• B. 1155
• C. 1145
• D. none of the above

Answer 1

Answer: (B)

1155

cylindrical pipe of internal diameter =7cm
radius=3.5cm
In 1 second Water flows 5 metre.
So, in 60 second Water flows 5*60=300 metre.
So volume of cylindrical pipe
$V=\pi r^{2}h$
$V=22/7\ast 3.5\ast 3.5\ast 30000$
$V=1155000{cm}^3$
and $1000c{m}^3=1litre$
So, $V=1155litre$