2 miles a way
Reports say that a polar bear can smell a seal over a mile away. That's on top of the ice, not under it. Bears can't smell seals that are under water.
Not nearly as far as they can smell. They may have relatively poor eyesight, but their keen noses are the most sensitive of any land animal. A polar bear can smell blood from miles away in subfreezing air temperatures.
The polar bear is the only mammal in North America that will actively hunt human beings. A Polar Bear can take a human head off with a single blow of its paw. Polar bears have very sensitive noses and can smell blood as far as 20 miles away.
They can easily smell a whale carcass 20 miles away or seals up to 6' beneath the snow and ice. This will depend on whether the animal is dead, which way the wind is going, if it is under the ice, if the polar bear can smell well, etc.
Only if they both live in a zoo, because Polar bears live in the Northern hemisphere and Sea Lions in the Southern hemisphere.
They can easily smell a whale carcass 20 miles away or seals up to 6' beneath the snow and ice. This will depend on whether the animal is dead, which way the wind is going, if it is under the ice, if the polar bear can smell well, etc.
A bear's sense of smell is incredibly acute. Polar bears have been known to smell seals as far as 30 km away! Among land animals, a bear arguably has the keenest sense of smell.
"Far" in French translates to "loin."
the averrage is about 2km but some beer can more 5km
Polar bears often travel hundreds of miles to find food.
i think not at all
about 5 feet