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.
The original question was: Since snails live both in water and on land when did God make snails? As some land snails seem to go underwater, are snails at the sea side and the snails in my garden the same sort of thing, or can all snails do that. Simon Terry has provided a very well illustrated answer to this question in his article Land and Sea Snails: Separate Creations.