26 cartons of 15 chocolates each cost rupees 2,145. Find the cost of 40 cartons of 18 chocolates each?

Cost of 26 cartons of chocolates = Rs 2145So, cost of 1 carton of chocolates = Rs 214526 = Rs 82.50Now, 26 cartons contain 15 chocolates each.Cost of 15 chocolates = Rs 82.50So, cost of 1 chocolate = Rs 82.5015 = Rs 5.50Now, cost of 18 chocolates = Rs 18 × 5.50 = Rs 99Now, 18 chocolates are packed in one carton.So, cost of 1 carton = Rs 99Cost of 40 cartons = Rs 40 × 99 = Rs 3960

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cost of 1 cartoon =2145
cost of 40 cartoon =2145*40
equal to=81800
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2860 rs 
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26 cartons of 15 chocolate each costs Rs. 2145
Then the cost of each chocolate is:-
Total cost/ total no. Of chocolate
=> 2145/26?15
=> 2145/390
=> Rs. 5.5 for each chocolate

For 40 cartons of 18 chocolate each, total cost will be:-
Cost of each chocolate? no. Of chocolates
=> 5.5? 40? 18
=> 5.5? 1120
=> Rs. 6160
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Here the ? Sign is multiplication sign...
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