A wall is of the form of a trapezium with height 4 m

A wall is of the form of a trapezium with height 4 m and parallel sides being 3 m and 5 m. What is the cost of painting the wall, if the rate of painting is Rs.25/- per square metre?

  1. Rs.800
  2. Rs.480
  3. Rs.400
  4. Rs.240

Answer

Area of trapezium wall = 1/2 * (3+5) * 4 = 16 sq. m.

Total cost of painting = 16*25 = 400

The correct option is C.