Calculation of volume of concrete.
V1 = Represents the volume of the base of the isolated footing.
V2 = Represent the volume of the trapezoidal portion.

Calculate the Volume of concrete in V1
Volume V1 = L x B x h
Volume V2 = H/3 (A 1 + A2 + √(A1 x A2))

Here A1 = Area of bottom of footing

A2 = Area of top of footing

the values of A1 & A2

A1 = L x B

A2 = L1 X B1

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