Question

Distance betweentwo parallel planes

2x + y + 2z –8 = 0 and 4x + 2y + 4z + 5 = 0 is

• A. 3/2
• B. 5/2
• C. 7/2
• D. 9/2

Answer 1

Answer: (C)

7/2

Answer 2

2x + y + 2z – 8 = 0

2x + y + 2z + 5/2 = 0

\ distance = $\left| \frac{5/2 + 8}{\sqrt{2^{2} + 1^{2} + 2^{2}}} \right|$ = $\frac{7}{2}$