exam Maths Puzzle Numerical Ability

I was trying to solve the same question as question 112229 but the answer in my book is 2340m and the answer to question 112229 was 2411m. I was wondering if there are any alternat

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exam Other Question

Log20x=6.5 A bag of nickels, dimes, quarters and loonies contain 55 coins with a total weight of 130, worth a total of $12.50. If dimes weigh 1, nickels weigh 2, quarters weigh 3, and loonies weigh 4, how many coins of each type are there?