Question

The dimensions of a room are 8m x 6m x h. It has two doors each of size 2m x 1m and one almirah of size 3m x 2m. . The cost of covering the walls by wall paper which is 40 cm wideat Rs. 1.25 per meter is Rs. 362.50, find h(height).

Answer 1

Area of four walls ka formula lagakar area nikla 28hm2
Area of both the doors and almirah is 10m2
Area to be painted=28h-10
Painted area= 362.50/1.25=290
Now
290*0.40=116
According to the question
116=28h-10
126=28h
h=126/28
h=4.5
hence the height is 4.5m

Answer 2

Answer:

Refer to attachment

Hope it helps you