By selling an article at Rs.400, a profit of 25% is made. Find its cost price?  Select
A) 228	B) 320	C) 287	D) 480	E) 811

Rationale: "sp = 400 cp = ( sp ) * [ 100 / ( 100 + p ) ] = 400 * [ 100 / ( 100 + 25 ) ] = 400 * [ 100 / 125 ] = rs . 320 answer : b"
Answer: B