Question

the pillars of a temple are cylindrical shaped.if each pillar has a circular base of radius 20cm & height 10cm, how much concrete mixture would be required to build 14 such pillars? (\pi=3.14)

Answer 1

radius=20 height=100cm(1m=100cm)volume=pi*r^2*h

mixture of 14 pillars

22/7*20*20*100*14=1760000cm3=17.6m3

Answer 2

Volume of cylinder=pi r²h
Volume of one cylindrical pillar=3.14 * 20*20*10
                                            =3140*4
                                            =12560 cm³
concrete used to make one pillar=12560 cm³
concrete used to make 14 such pillar=12560*14
                                                     =175840 cm³