Question

Find the cost of papering the four walls of a room 16 meters long 12 meters broad and8 meters high with paper 2 meters wide at Rs 50 per meter

Answer 1

there are 4 walls with 2 walls having area =8×12 and another 2 walls having area=16×8

so u have to calculate the total area  of 4 walls

Answer 2

there are 4 walls with 2 walls having area =8×12 and another 2 walls having area=16×8

so u have to calculate the total area  of 4 walls
this would be the best way to do it anyway