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A 30x30 metre garden is split into 9 equal squares as shown. The shaded areas are planted with flowers, at a cost of 10,000 Uzbek soum per square metre. The white areas are cleaned at a cost of 1,000 Uzbek soum per square metre. How much money is spent to maintain the garden (for planting and cleaning)?
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Shaded area
(2/9) * (30 * 30)
200 m²
Shaded Cost
200 * 10,000
2,000,000 Uzbek soum
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White area
(7/9) * (30 * 30)
700 m²
White cost
700 * 1,000
700,000 Uzbek soum
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How much money is spent to maintain the garden (for planting and cleaning)?
2,000,000 + 700,000
2,700,000 Uzbek soum <––––––
Each gray area is half a square so they total 4/2 or 2 squares, times (30 x 30) or 900 m² = 1800 m² flowers. So do 1800 x 10000 for them.
Then 9 - 2 = 7 squares white times 900 = 6300 m² times 1000. Add the two answers.