Latest SSC Aptitude Question SOLUTION: Water is flowing at the rate of 3km/hr through a circular pipe of 20 cm internal diameter into a circular cistern of diameter 10m and depth 2 m. In how much time will the cistern

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(#M40026031) SSC Numerical Ability question CGL quant Keep an EYE

Water is flowing at the rate of 3km/hr through a circular pipe of 20 cm internal diameter into a circular cistern of diameter 10m and depth 2 m. In how much time will the cistern be filled?

Asked In SSC Rats (10 years ago)

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SRIKRISHNA.S  (7 years ago)

velocity=3 km/hr =3000 m/s
internal diameter of circular pipe =20cm =20/2=10cm=radius
since the radius is in 'cm' we must convert it into 'm' =10/100 =1/10 m
diameter of cistern(cylindrical shaped)=10m/2 =5m=radius of cistern

now,

time=volume of water in the cistern/volume of water flowing in the pipe

=pie*5*5*2/pie*1/10*1/10*3000(since velocity is the length or height of the circular pipe)
=50pie/30pie=5/3(since 'pie' and '0' will get cancelled)
=1.66 seconds=correct value

(OR)

1 hour 40 min=approximate value in kmhr format ...

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