Question

The cost of carpeting a floor is Rs.120 but if the length hsd been 3 metres less than it is,the cost would have been Rs.105.Find its length​

Answer 1

Answer:

Let the length and breadth of the room be x m and y m respectively.

Cost of carpeting xym

2

= Rs. 120

Cost of carpeting x(y−4) m

2

= Rs (120−20)= Rs. 100

∴

xy

x(y−4)

=

120

100

⇒

y

y−4

=

6

5

⇒6y−24=5y⇒y=24m