Math Chapter Wise question with answer

Q01 If the plane 2x – 2y + z = 9 touches the sphere x2 + y2 + z2 = r2, then the value of 'r' will be: English · UK SSSC LT 2020 Q02 The plane 2x y z 12 + + = + + = + + = + + = touches the 2 2 2 x y z 24 + + = + + = + + = + + = sphere at the point English · UP PCS (Pre) 1996 Q03 The value of 'a' for which the plane x + y + z = a 3 touches the sphere x2 + y2 + z2 – 2x – 2y – 2z – 6 = 0 will be... English · UP PCS (Pre) 1996 Q04 The plane 2x 2y z 0 touches the sphere 2 2 2 x y z 2x 4y 2z 3 0 if is equal to– English · UP PCS (Pre) 2003 Q05 The plane lx + my + nz = p touches the coincoid ax2 + by2 + cz2 = 1, if English · PGT 2009 Q06 A sphere 2 2 2 x + y + z = 9 is cut by the plane x + y + z = 3The radius of the circle so formed is: English · Haryana PGT 2018