Let us calculate the volume of the **dome slab** as shown below.

Now, let us observe a section of a dome slab having a **semi-spherical shape** as shown below.

__Given data:__

Slab thickness = 0.15m. = 150mm.

Outer diameter of dome slab = D = 6.3m.

Height of dome slab = Inner radius = 3m.

Inner radius of slab = r = 3m.

**Calculation:**

The volume of the semi-spherical slab is calculated by the formula

= [2/3 × π × { ( R )3- ( r )3 }]

Where

R = outer radius

= D/2 = [6.3m ÷ 2] = **3.15m.**

**The volume of the semi-spherical slab**

= [2/3 × 3.142 × { ( 3.15m. )3- ( 3m )3 }]

= [2/3 × 3.142 × { 31.256 - 27}]

= [ 2.094 × 4.256 ]

= **8.912 cum.**

= **314.72 cu ft.**

**The outer surface area of the semi-spherical dome slab**

= [2 × π × ( R )2]

**62.35 sq m.**

**671.16 sq ft.**

**To go through all types of quantity estimate articles,** **click here.**

**Thank you for going through these calculation steps❤. Have a good day 😄.**

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