Estimating and Costing
According to Indian Standards Institute, the actual size of modular bricks is

20 cm x 10 cm x 10 cm
19 cm x 9 cm x 9 cm
23 cm x 11.5 cm x 7.5 cm
25 cm x 13 cm x 7.5 cm

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Estimating and Costing
In the mid-section formula

The mean depth is the average of depths of two consecutive sections
All of these
The area of mid-sections is calculated by using mean depth
The volume of the earth work is calculated by multiplying the mid-section area by the distance between the two original sections

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