The cost of carpeting a room 18m long with a carpet 75cm wide at Tk. 4.50 per meter is Tk. 810. The breadth of the room is:

A) 7 m
B) 8 m
C) 7.5 m
D) 8.5 m

Show answer

Answer: C) 7.5 m

Explanation

7.5 m. First find how much carpet was bought: 810 ÷ 4.50 = 180 m of carpet. Its width is 75 cm = 0.75 m, so it covers 180 × 0.75 = 135 m². The carpet covers the floor exactly, so floor area is also 135 m². Breadth = area ÷ length = 135 ÷ 18 = 7.5 m.

Asked in: KGDCL 2016

Topic: Geometry and Mensuration

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The cost of carpeting a room 18m long with a carpet 75cm wide at Tk. 4.50 per meter is Tk. 810. The breadth of the room is:

Explanation

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