There is a dug on a surface, a frog at 4foot below the dug, and then another frog is 3.5foot from dug and 3.5 foot from the first frog. How far is this frog under the surface?
-
数学PS
-
There is a dug on a surface, a frog at 4foot below the dug, and then another frog is 3.5foot from dug and 3.5 foot from the first frog. How far is this frog under the surface?
显示答案
正确答案: B