In the interior of a forest, a certain number of apes equal to the square of one-fifthhth of the total number are playing and having great fun. The remaining four apes are on a hill and the echo of their shrieks by the adjoining hills frightens them. They came and join the apes in the forest and play with enthusiasm. What is the total number of apes? Choose the correct choice from the following choices
A) 48	B) 16	C) 5 or 20	D) 80	E) 16 or 48
Let total number be x   No in the interior = (x/5)^2   No outside = 4   So : x - (x/5)^2=4   x^2-25x+100=0   (x-20)(x-5)=0   So either x=5 or x=20   5 or 20
<result>C</result>
In the interior of a forest, a certain number of apes equal to the square of one-fifthhth of the total number are playing and having great fun. The remaining four apes are on a hill and the echo of their shrieks by the adjoining hills frightens them. They came and join the apes in the forest and play with enthusiasm. What is the total number of apes?