"आपके पिता कैसे हैं?"

Translation: How is your father?

[sweety25523]

Why aapke instead of aapka

[vinay92]

It's the 'respectful plural' form. You treat words relating to people elder than you or worthy of your respect (पिता, दादा, दादी, गुरु etc) as if they are plural. This is not a grammatical requirement but simply a convention.

So आपके is used instead of आपका and हैं instead of है .

[BigAl82]

Does it mean the same in Hindi?

https://en.m.wiktionary.org/wiki/how%27s_your_father

[vinay92]

No. This is a straightforward question in Hindi.

[RashmiSomp]

Means how is your father