Question

The cost of papering the four walls of a room 12 m long at 6:50 per square metre ia
1638 and the cost of matting the floor at 3.60 per square metre is? 378. Find the height
of the room.​

Answer 1

Answer:

6m

Step-by-step explanation:

length of room (l)=12m

area of floor =l×b=12×b

Total cost of matting floor =12×b×3.50=378

                                            42b=378

                                             b=9m

Area of walls of the room =2h(l+b)

                                          =2h(12+9)

                                          =42h$m^{2}$

 Total cost of papering walk =42h×6.50=1638

                                               273h=1638

                                               h=6m.