Find the area of trapezium whose parallel sides are 28 cm and 20 cm long, and the distance between them is 21 cm?  Options:
A) 288 cm2  B) 277 cm2  C) 504 cm2  D) 510 cm2  E) 287 cm2
Area of a trapezium = 1/2 (sum of parallel sides) * (perpendicular distance between them)   = 1/2 (28 + 20) * (21)   = 504 cm2   Answer: 504 cm2
<result>C</result>
Find the area of trapezium whose parallel sides are 28 cm and 20 cm long, and the distance between them is 21 cm?