Square Feet. The square foot is a unit of area used in the imperial and U.S. customary measurement systems. A square measurement is the two-dimensional derivative of a linear measure, so a square foot is defined as the area of a square with sides 1 ft in length.
http://wiki.answers.com/Q/How_long_is_a_black_rhino_pregnant_for. A Black Rhino is pregnant usually between 419 and 478 days, or 15 to 16 months. The mother will give birth to a single calf, weighing in on average 35 to 50 kg, (about 80 pounds). The calf will stay with it's mother anywhere from 2 to 3 yea...
Though rhinos don't often hang out with each other, they do hang out with birds. The oxpecker will sit on a rhino's back and eat the bugs that crawl on the rhino's skin. That's not the only thing this bird is good for. When danger approaches, the bird will call out, warning the rhino.ffspring. Every two and a half to five years, a female rhino will reproduce. Female rhinos carry their young for a gestation period of 15 to 16 months. They usually only have one baby at a time, though they do sometimes have twins.