সঠিক উত্তর হচ্ছে: ৭২ দিন
ব্যাখ্যা: if you mean everyday the clock goes back 10 minutes in time
\nit takes 6 days to go an hour back(10*6=60)
\nso we need to back 12 hours to get back to our original time
\nso 6*12=72, we would 72 days to get back our original time
