Maths-
General
Easy
Question
A rectangular floor of a room is 18 m long 12 m wide.Find the cost of covering the floor with carpet 6 m wide at Rs 40 per metre.
Hint:
Area of a rectangle = length × breadth
The correct answer is: ∴ Cost of covering the floor with carpet is Rs. 1,440.
Step-by-step solution:-
As per the given information-
Floor is to be fully covered with the carpet.
∴ Area of the carpet = Area of the floor …...................................................................... (Equation i)
Now, For the floor-
Length = 18m
Breadth = 12m
∴ Area of the floor = length × breadth
∴ Area of the floor = 18 × 12
∴ Area of the floor = 216 m2 ....................................................................................... (Equation ii)
From Equations i & ii-
Area of the carpet = 216 m2
∴ length × breadth = 216
∴ length × 6 = 216 ..................................................................................................... (From given information)
∴ length = 216 / 6
∴ length = 36 m
Cost of carpet @ Rs. 40 per mt = 36 m × Rs. 40 per mt
∴ Cost of carpet @ Rs. 40 per mt = Rs. 1,440
Final Answer:-
∴ Cost of covering the floor with carpet is Rs. 1,440.
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