Math Chapter Wise Sphere, Cone And Cylinder English MCQ Rajasthan TGT 2013 Q.The equation of the right circular cylinder whose axis is z-axis, and radius r is- Ax2 + y2 = r2 Bx2 + z2 = r2 Cy2 + z2 = r2 Dx2 + y2 + z2 = r2 Show answer Correct answer: x2 + y2 = r2