Question

Kurt has nickels and dimes in a jar. The ratio of nickels to dimes is 4 to 5. He has a total of 135 coins in the jar. Each nickel has a mass of 5.0 grams, and each dime has a mass of 2.3 grams.

1,000 grams is approximately 2.2 pounds

What is the approximate weight, in pounds, of the coins in Kurt's jar? Round the answer to the nearest tenth.

Answer 1

1.

Explanation:

1) if the ratio is 4:5, then the number of nickels is 60, the number of dimes is 75 (it is calculated from the equation 4x+5x=135);

2) the mass of all the nickels is 60*5=300 [gr], the mass of all the dimes is 75*2.3=172.5 [gr]. Then the mass of all the coins is 172.5+300=472.5 [gr].

3) if 1000 [gr] is 2.2 [pnd], then 472.5 [gr] is 1.0395 [pnds], it approximately is 1 pound.