for a adult its 10000 steps a day for a kids it depends on how old he is
15 minutes of "mildly moderate" walking = 1500 steps
around 10000 steps
If I'm not mistaken, it's not based on time, but steps, as in most of the game events related to that. I think it is 10000 steps. So, to answer your question directly, how much time it takes to hatch an egg is however long it takes you to get 10000 steps built up. I recommend a bicycle because that still counts as steps and it's fast.
i think 10000 steps it need to hatch
the egg hatches manaphy since manaphy and phione are different pokemon. it takes about 5000-10000 steps
Depending on the Pokemon, it could be anywhere from around 2000 steps to 10000 steps. Rarely, the steps could be around 20000, but very rarely. Most Pokemon hatch at around 5000, though.
10000 hours
I think ALL eggs take 15000 steps to hatch.
10000 years
10000 hours
An adult should take 10,000 steps in a day. Though 10,000 steps for a child is too low. Remember that a journey of 10,000 steps starts with a single one.