Find the area of trapezium whose parallel sides are 20 cm and 18 cm long, and the distance between them is 20 cm?  Choose the most appropriate option:	A) 827 cm 2	B) 380 cm 2	C) 285 cm 2	D) 178 cm 2	E) 176 cm 2

Rationale: "area of a trapezium = 1 / 2 ( sum of parallel sides ) * ( perpendicular distance between them ) = 1 / 2 ( 20 + 18 ) * ( 20 ) = 380 cm 2 answer : b"
Answer: B