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The Trapezoidal rule of volumes V of an embankment divided into a number of sections equidistant D, is given by

V = D $[ \frac { A1 +An } { 2 }$ + A2 +A3 +.....An-1]

V = $\frac {D} { 2 }$ $[\frac { A1+An } {4 }$ +A2 +A3 +.......An -1]

V = $\frac {D} { 2 }$ [ [A₁ + A_n + 2(A₂ + A₄ + ... + A_{n - 1}) + 4(A₃ + A₅ + ... + A_{n -- 2})]

V = $\frac {D} { 2 }$ [A₁ + A_n + 4(A₂ + A₄ + ... + A_{n - 1}) + 4(A₃ + A₅ + ... + A_{n - 2})]

Answer : Option A

Explanation :

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