Lawns

Before a sports hall are two equally large rectangular lawns, each measuring 40 m and 12 m. Maintenance of 10m² lawn cost 45 CZK yearly. On each lawn is circular flowerbed with a diameter 8 meters. How much money is needed each year to take on lawn care? Result roundto the nearest CZK crown.

Result

x =  3868

Solution:

x=2 (45/10) (40 12π (8/2)2)=3868 Kcx=2 \cdot \ (45/10) \cdot \ (40 \cdot \ 12-\pi \cdot \ (8/2)^{ 2 })=3868 \ \text{Kc}



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