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?

Answer 1

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 = $\mathrm{\pi }{r}^{2}h=\frac{22}{7}\times {\left(0.2\right)}^2\times 10{\mathrm{m}}^3$

∴ Amount of concrete mixture required to build 14 such pillars

= Volume of concrete mixture used in each pillar × 14

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

= 17.6 m³