The total cost of flooring a room at Tk. 8.50 per square meter is Tk. 510. If the length of the room is 8 m, what is its breadth?

Question: The total cost of flooring a room at Tk. 8.50 per square meter is Tk. 510. If the length of the room is 8 m, what is its breadth?

Solution:
Given,
Cost of flooring per square meter = Tk. 8.50
Total cost of flooring = Tk. 510

So,
Area of the room = Total cost/Cost per square meter
= 510/8.50
= 60 square meters

Again,
Length of the room = 8 m

We know,
Area of a rectangle = Length × Breadth
∴ 60 = 8 × Breadth
⇒ Breadth = 60/8
= 7.5 m

Correct Answer: ক) 7.5 m