26 cartoon of 15 choclates each cots 2145.find the cost of 40 cartoon of 18 choclateseach
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No. Of chocolates = 26×15 = 390
Cost of 390 chocolates = 2145
Cost of 1 chocolate = 2145/390=5.5
No. of chocolates in second case = 40×18=720
Cost of 720 chocolates = 720×5.5=3960
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