Question

8. The length of a room is thrice of its breadth. The cost of flooring the surface at 25 paise per sq. m. is Rs 75. Find the length and breadth of the room.​

Answer 1

Answer:

Length = 30m

Breadth = 10m

Step-by-step explanation:

Let the breadth of the room be b .

So , length of the room = 3b

So , area of the room = 3b²

Total cost of flooring = ₹75

Cost of flooring a sq. m = 25p = ₹0.25

So , size of the floor = 75/0.25 = 300m²

3b² = 300m²

⟹ b² = 300m²/3

⟹ b² = 100m²

⟹ √b² = √100m²

⟹ b = 10m

∴ Breadth of the room is 10m , while length is 30m .