Question

The pillars of the temple are cylindrical shape. Each pillar has cylindrical base radius 25cm and the height 10.5cm. Find the quantity of concrete used to build 30 such pillars. Also find the concrete mixtures at the rate of Rs 250/m 2 ???

Answer 1

r= 25cm
h= 10.5cm

Volume (cylinder)= πr²h
V (30 pillars)= 30π×25×25×10.5
=30 × 22/7 × 625 × 10.5
=660×625×1.5
=618750cm³

CSA (30 pillars)=30×2πrh
=60×22/7×0.25×0.105
=60×22×0.25×0.15
=49.5m²
So total cost = 49.5×250
= 12375Rs