# A cylindrical pipe has inner diameter of 7 cm and water flows through it at the rate of 192.5 litres per minute. Find the rate of flow in km/hour.

1
by sahbahasan

by sahbahasan

now in 1minute it collects 192500cm^3 of water so in 1hour it collects 192500*60(1hour=60minutes)

now we have to find out the height ( rate of flow is same as height)

so volume of cylinder =3.14*r^2*h

so, 22/7*3.5*3.5*h=192500*60

h=300000cm =3km

so rate of flow =3km per hour

now convert 192.5litre into cm that equals (1000cm^3=1litre) so there are 192500cm

now in 1minute it collects 192500cm^3 of water so in 1hour it collects 192500*60(1hour=60minutes)

now we have to find out the height ( rate of flow is same as height)

so volume of cylinder =3.14*r^2*h

so, 22/7*3.5*3.5*h=192500*60

h=300000cm =3km

so rate of flow =3km per hour