# Distance between two parallel planes

Question:

Distance between two parallel planes $2 \mathrm{x}+\mathrm{y}+2 \mathrm{z}=8$ and $4 \mathrm{x}+2 \mathrm{y}+4 \mathrm{z}+5=0$ is :-

1. $\frac{3}{2}$

2. $\frac{5}{2}$

3. $\frac{7}{2}$

4. $\frac{9}{2}$

Correct Option: , 3

Solution: