Question

length of classroom is two times its height and its bredth is one and a half times its height .the cost of white washing the walls at the rate of rs.1.60 per m2 . is Rs 179.20 . find the cost of tiling the floor at the rate of RS.12.75 PER M 2.

Answer 1

Let height be x

Length=2x

Breadth =1 1x/2=3x/2

Area of 4 walls of room=179.20÷1.60=112m^2

2 (l+b)×h=112

2 (2x+3x/2)×x=112

2×7x^2/2=112

x^2=16

x=4

So height=4m

Length=8m

Breadth=6m

For tiling the floor we will find the area

Area=l×b=8×6=48m^2

Cost of tiling the floor =48×12.75=Rs.612

Required answer is Rs.612

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