How do you say "Have a nice (good) day" in Hindi?
And how do you say "is this the final price?" or " final price" Oh and "where is (example:) Central park?"

Question

How do you say "Have a nice (good) day" in Hindi?
And how do you say "is this the final price?" or " final price" Oh and "where is (example:) Central park?"

Answer

Good Day-Shubh din  (Shubh-good, din-day)
Have a nice day is not really used... Atleast I havent heard anyone use it despite my 7 year stay in North India(Orissa)
Is this final price- Yeh aapka akhri dam hai? (Yeh-This, aapka-your, akhri-final, dam-price)
Where is- Kahan hai? (kahan-where)
Where is central park? Central park kahan hai
Hope this helps you :)

Answer

have a nice day-aapka din(day) achha(nice) ho  [to show respect basically when the person you aretalking is older than you-use aapka(you)]
otherwise-tumhara din achha ho
shubh is used for auspicious
is this the final price-kya yeh(this) akhri(final) kimat(cost) hai
kimat(daam bhi keh sakte hai)
where is central park-central park kahan(where) hai(is)

I think you  get your answer

Answer

But we prefer to say "Aapka din Mangalmay ho"

Answer

Aapka din shubh ho.

Answer

aap ka din subh(acha) ho ))
आपका दिन अच्छा हो ))
aap ka -you -आपका .
din -day-दिन .
acha,subh-nice(good) -अच्छा .
ho-हो