Ask Question
19 January, 05:23

A piano has 88 keys. The ratio of white keys to black keys is 13.9. How many black keys does a piano have?

+4
Answers (1)
  1. 19 January, 05:30
    0
    Black keys=b

    white keys=w

    b+w=88|·9

    w:b=13/9⇒9w=13b

    9b+9w=792

    13b+9b=792

    22b=792|:22

    b=36 keys

    w=88-36

    w=52 keys
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “A piano has 88 keys. The ratio of white keys to black keys is 13.9. How many black keys does a piano have? ...” in 📗 Mathematics if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers