A washing tub in the shape of a frustum of a cone has height 21 cm. The radii of the circular top and bottoim are 20 cm and 15 cm respectively. What is the capacity of the tub. Share with your friends Share 0 Yash Raj answered this Dear Student. Volume of a frustum of a cone is π3h(R2+r2+Rr)Here R=20r=15, h=21Putting these values:223×7×21(400+225+300)=22×925=20350 cm2 We hope that this answer helps you. Regards. -2 View Full Answer