A pillar 11 m in radius is 21 m high. How much material was used to construct it?(Use π=22/7)
Answer & explanation
Correct answer: option 4
We know that,
Volume of a cylinder = πr2h
Given,
Radius of the pillar = 11 m
Height of the pillar = 21 m
So, according to the question,
Material used = \(\frac{22}{7}\)× 112 × 21
= 22 × 121 × 3 = 7986 m3