Question

A room is twice as long as it is a board and it’s height is 4.5 m. If the cost of papering the wall is Rs 15 per sq.meter is Rs 2430 find the cost of paving marble on its floor at Rs 150 per sq.meter.

Answer 1

Step-by-step explanation:

Area of four walls = 2.5×(7.5+5.5)

=130m

2

Area of required papers = 130m

2

Breadth of paper = 40 cm =

100

40

m=0.4 m

Area = l×b

130=l×0.4

length =

4

130

=325m

Cost of paper at 80 p per meter = 325×0.80

=Rs260