Daniel is painting the walls and ceiling of a cuboidal hall with length, breadth and height of 15 m, 10 m and 7 m respectively. From each can of paint 100m2of area is painted. How many cans of paint will she need to paint the room?
Here, Length of wall l = 15 m, Breadth of wall b= 10 m
And Height of wall h= 7 m
Total Surface area of classroom to be painted = lb+2(bh+hl)
=15×10+2(10×7+7×15)
=150+2(70+105)
=150+350
=500 m2
Now Required number of cans=Area of hallArea of one can=500100=5 cans
Hence, 5 cans are required to paint the room.