Question

The total area of four walls of a room is 120 square metre its height is 2 metre if the floor in the form of a square find the total cost of flooring @ rupees 78 per square metre and painting the selling @ 126 per square metre is

Answer 1

Answer:

Since the floor is a square,

Length = Breadth

TSA = 120m²

= 2(l+b)h= 120m²

= 2×(l+l)×2m=120m²

=2×2l×2m=120m²

=l=120m²/(2×2×2m)

=l=120m²/8m

=l=15m

Therefore,

length=15m and breadth = 15m

Now, cost of flooring

=Rs 78×area of square

=Rs 78×15×15

=Rs 17550

And, Cost of painting ceiling

= Rs 126 × Area of square

= Rs 126 × 15×15

= Rs 28350