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Estimating and Costing - Engineering

Q1:

The ground surface slopes 1 in 50 along a proposed railway embankment 150 m in length. The height of the embankment at zero chainage is 0.5 m, the width is 11 m and side slopes 2:1. If the falling gradient of the embankment is 1 in 150, the quantity of the earthwork calculated by prismoidal formula, is

A 3250 m3

B 3225 m3

C 3275 m3

D 3300 m3

ANS:B - 3225 m3

{(11+13)/2×0.5 + (11+21)/2×2.5}/2 × 150 = 3450cum is the right answer.