question_answer

It                                                                                                                         \[l\] , b, h are the length, breadth and height of a room, then area of 4 walls will be

A)                                                                           \[\text{2}\left( l\text{ }+\text{ b} \right)\text{h}\]  

B)                                                                                     \[\left( l\text{ }+\text{ b} \right)\text{h}\]

C)  \[lbh\]

D)                                                                         \[\text{2}\left( l\text{b}+\text{bh}+\text{h}l \right)\]