A flagpole 18 meters high casts a shadow of length 45 meters. If a building under similar conditions casts a shadow of length 70 meters, what is the height of the building (in meters)?
Choose one:
A) 20	B) 24	C) 28	D) 32	E) 36

Rationale: "the height : length ratio will be equal in both cases . 18 / 45 = x / 70 x = 28 the answer is c ."
Answer: C