There is semi circular ring type flower bed with outer radius 18 cm & inner radius 11cmfind the cost of measuring the flower bed if the cost of 1m is Rs 2. 50
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(πr1^2-πr2^2)×2.5÷10000
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[tex]22/7 [ (18 ) ^2 - (11)^2] = area of ring
22/7 x 203
= 22 x 29
= 638cm^2
[/tex]
cost = 638 x 2.50 /10000
= 1595/10000
= 0.1595 RS
cost = 638 x 2.50 /10000
= 1595/10000
= 0.1595 RS
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