The average age of 30 boys in a class is 16 years The average of the ages of the boys and the teacher is 17 years The age of teacher is? avg of 30 is 16=30*16=480 avg of 30 and 1 teacher is 17=31*17=527 Save then age of teacher is 527-480=47... 3 people found this useful.
Giant African Land Snail in Florida. Giant African land snail, Achatina (Lissachatina) fulica, is considered by some to be one of the most damaging snails in the world. It has been observed to feed on at least 500 different types of plants, many of them crops.
There are five species of apple snails in Florida, but only one is native, and Florida is the only place in the world where the native Florida apple snail occurs. They can live to be two years old and can grow to the size of a plum! Apple snails face conservation issues of their own that in turn affect the species that depend on them, like Limpkins and Snail Kites.