Given:
Radius of the base of a cylinder = 20 cm
Height of cylinder = 10 m = 1000 cm [1m = 100 cm]
Volume of the cylindrical pillar = πR2H
= \(({22\over7}×202×1000)\) cm3
= \(8800000 \over7\) cm3
or 8.87 m3
Therefore, volume of 14 pillars
= 14 x 8.87 m3
= 17.6 m3