# Water Flows Out Through a Circular Pipe Whose Internal Diameter is 2 Cm, at the Rate of 6 Metres per Second into a Cylindrical Tank, the Radius of Whose Base is 60 Cm. Find the Rise - Mathematics

Sum

Water flows out through a circular pipe whose internal diameter is 2 cm, at the rate of 6 metres per second into a cylindrical tank, the radius of whose base is 60 cm. Find the rise in the level of water in 30 minutes?

#### Solution

Radius of the circular pipe = 0 . 01 m
Length of the water column in 1 sec = 6 m
$\text{ Volume of the water flowing in 1 s }= \pi r^2 h = \pi(0 . 01 )^2 (6) m^3$
$\text{ Volume of the water flowing in 30 mins }= \pi(0 . 01 )^2 (6) \times 30 \times 60 m^3$
Let h m be the rise in the level of water in the cylindrical tank .
$\text{ Volume of the cylindrical tank in which water is being flown }= \pi(0 . 6 )^2 \times h$
Volume of water flowing in 30 mins = Volume of the cylindrical tank in which water is being flown
$\pi(0 . 01 )^2 (6) \times 30 \times 60 = \pi(0 . 6 )^2 \times h$
$h = \frac{6(0 . 01 )^2 \times 30 \times 60}{0 . 6 \times 0 . 6}$
h = 3 m
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#### APPEARS IN

RD Sharma Class 8 Maths
Chapter 22 Mensuration - III (Surface Area and Volume of a Right Circular Cylinder)
Exercise 22.2 | Q 30 | Page 26