Area of a four walls a room is 168 Sq. meters . The breadth

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Area of a four walls a room is 168 Sq. meters . The breadth and height of a room are 8 meters and 6 meters respectively . The length of the room is ?

1. 14 meters
2. 12 meters
3. 6 meters
4. 3.5 meters

Correct Option: C

Area of a four walls = 2(l + 8) x 6 = 168m²
⇒ (l + 8) = 14
∴ l = 14-8
= 6 meters