**How to calculate size of circular water tank and its capacity**

**■ size of circular water tank**

■ **introduction**:- in this topic we will learn about how to calculate size of circular water tank and its capacity. In a small residential building you have to used to stored water in water tank various purpose like **cooking ,drinking, bathing, using toilets cleaning clothes, cleaning house cleaning utensils and many purpose**. Water tank may be made in various shape and size like a rectangular water tank and circular water tank storing water. But in this topic we know about size of circular water tank and its capacity

**How to calculate size of circular water tank and its capacity**

Assume we have need 2000 litre of capacity of circular water tank, how we calculate size of circular water tank

**■ Calculation of size of circular water tank having water capacity is 2000 litre**

Given capacity of circular water tank

= 2000 litre

We know that 1000 litre = 1m3

2000 litre = 2×1m3= 2m3

Volume of circular water tank = πr2h

Where V= volume of circular water tank

r = radius of circular water tank

h = height of circular water tank

π =pie = 3.14

Both dimension radius and height of circular water tank is not given so we should assume One dimension radius or height of circular water tank

We assume diameter = 1 meter

Radius = diameter/2 = 1/2 = 0.5 m

Putting the value of all given dimension volume radius and height

Volume = πr2h , π = 3.14

2 = 3.14 ×( 0.5)2 ×h

2 = 3.14 × 0.25 × h

2 = 0.7850 × h

Height = 2/0.7850 = 2.547 meter

**So we have to need 2000 litre of circular water tank capacity size of circular water tank is**

Volume = 2000 litre = 2 m3

Diameter of water tank = 1 m

Height of water tank = 2.547 m

**■ Calculation of size of circular water tank having water capacity is 10000 litre**

Given capacity of circular water tank

= 10000 litre

We know that 1000 litre = 1m3

10000 litre = 10×1m3= 10m3

Volume of circular water tank = πr2h

Where V= volume of circular water tank

r = radius of circular water tank

h = height of circular water tank

π =pie = 3.14

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**Both dimension radius and height of circular water tank is not given so we should assume One dimension radius or height of circular water tank**

We assume diameter = 3 meter

Radius = diameter/2 = 3/2 = 1.5 m

Putting the value of all given dimension volume radius and height

Volume = πr2h , π = 3.14

10 = 3.14 ×( 1.5)2 ×h

10 = 3.14 × 2.25 × h

10 = 7.065 × h

Height = 10/7.065 = 1.415 meter

So we have to need 10000 litre of circular water tank capacity size of circular water tank is

Volume = 10000 litre = 10 m3

Diameter of water tank = 3 m

Height of water tank = 1.415 m