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Question
Divide the park shown in the figure of question 40 into two rectangles. Find the total area of this park. If one packet of fertilizer is used for 300 sq m, how many packets of fertilizer are required for the whole park?
Solution
Area of rectangle ABCD = Length × Breadth
= (150 × 100) m2
= 15000 m2 
And area of rectangle AGFE = Length × Breadth
= (270 × 180) m2
= 48600 m2
∴ Total area of the park = 15000 m2 + 48600 m2
= 63600 m2
Number of packets of fertilizer used for 300 m2 = 1
∴ Number of packets of fertilizer used for 63600 m2 = `63600/300` = 212
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