"क्या तुमने यह किताब पढ़ी है?"

Translation: Have you read this book?

[swturley]

Did you read this book

[juggledean]

was marked incorrect. Why?

[Shubhani_M]

As far as I understand it:
"क्या तुमने यह किताब पढ़ी?" = "Did you read this book?;
"क्या तुमने यह किताब पढ़ी है?" = "Have you read this book?"

[ambrasanta]

why "have you studied " isn't good?

[Shubhani_M]

Because it talks about a book. "Have you studied this book?" might work.

[shemayokamaraii]

Why is "did you read this book" incorrect?

[Shubhani_M]

I answered this question above.