a small book publisher knows that 21 books weighs 38 pounds, how much does 38 books weigh

Answer 1

If we know that 21 books weigh 38 pounds and we are trying to find out the weight of 38 books, we need to set a proportion.

21 books = 38 pounds

38 books = x pounds

Now we just cross multiple --> x(21) = (38)(38)

21x = 1,444

x = 68.76 pounds

So if 21 books weigh 28 pounds, 38 books will weigh about 68.76 pounds.

I hope this helps, if you have any other questions please let me know. Thanks.