Cylindrical pillars are to be made for a flat whose radius is 15cm and height is 3.5m. What is the total amount of concrete (in cm^3) required to make 15 identical pillars? (Take π = \(\frac{22}{7}\))
A. 3513600
B. 3712500
C. 4125300
D. 3917800
The question was asked by my college director while I was bunking the class.
My question is based upon Volume of a Cylinder in chapter Surface Areas and Volumes of Mathematics – Class 9
Correct choice is B. 3712500
Explanation: Volume of one cylindrical pillar = πr^2h
= \(\frac{22}{7}\) * 15 * 15 * 350
= 247500cm^3
Hence, total volume of 15 pillars = 15 * 247500
= 3712500cm^3
Therefore, the total amount of concrete required to make 15 identical pillars = 3712500cm^3.