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:

- ক) 7 m
- খ) 8 m
- গ) 7.5 m
- ঘ) 8.5 m
উত্তর দেখুন
উত্তর: গ) 7.5 m
ব্যাখ্যা
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.
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