a honey bee has to go on how many flowers to collect one pound of honey and how much it has to travel?

Answer 1

Honeybees visit approximately two million flowers to make one pound of honey
A bee travels an average of 1600 round trips in order to produce one ounce of honey - as far as 6 miles per round trip.
Bees from the same hive visit approximately 225,000 flowers per day - one bee usually visits between fifty and a thousand flowers per day, but sometimes up to several thousand.

Answer 2

Bees do not collect honey. They collect nectar and pollen, which is turned into honey back at the hive.