The pillars of a temple are cylindrically shaped. Each pillar has a circular base of radius 20 cm and height 10 m.

Question:

The pillars of a temple are cylindrically shaped. Each pillar has a circular base of radius 20 cm and height 10 m. How much concrete mixture would be required to build 14 such pillars?

Solution:

Radius of each pillar, r = 20 cm = 0.2 m   (1 m = 100 cm)

Height of each pillar, h = 10 m

Volume of concrete mixture used in each pillar $=\pi r^{2} h=\frac{22}{7} \times(0.2)^{2} \times 10 \mathrm{~m}^{3}$

∴ Amount of concrete mixture required to build 14 such pillars

= Volume of concrete mixture used in each pillar × 14

$=\frac{22}{7} \times(0.2)^{2} \times 10 \times 14$

$=17.6 \mathrm{~m}^{3}$

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