Final answer:
To add two weights in pounds and ounces, add the ounces and pounds separately. Since 1 pound equals 16 ounces, any excess should be converted into pounds but in this problem, the ounces added up to less than 16. The final sum is 62 lb 21 oz.
Step-by-step explanation:
To perform the indicated operation of adding two weights in pounds and ounces, we need to add the pounds and ounces separately. If the ounces exceed 16, we need to convert the excess into pounds since 1 pound equals 16 ounces. The operation is: 28 pounds (lb) + 15 ounces (oz) + 34 pounds (lb) + 6 ounces (oz).
First, add up the ounces: 15 oz + 6 oz = 21 oz. This does not exceed 16, so we don't need to convert any ounces to pounds in this case.
Next, add the pounds: 28 lb + 34 lb = 62 lb. Now combine the pounds with the ounces for the final result.
The sum of the weights is 62 lb 21 oz, which corresponds to option (b).