Question

The length of the perpendicular from the origin to the plane $3x + 4y + 12z = 52$is

• A. 3
• B. –4
• C. 5
• D. None of these

Answer 1

Answer: (D)

None of these

Answer 2

$p = \left| \frac { - 52 } { \sqrt { 9 + 16 + 144 } } \right| = \left| \frac { - 52 } { 13 } \right| = | - 4 |$ = 4.