Question

find the cost of white washing at trapezium wall whose parallel side are 65 metre and 72 metre and non-parallel side are equal to 250dm. give the rate of white washing 155 per metre square

Answer 1

Answer:

250 dm = 25 m

Length of parallel sides are 65 m and 72 m

Height = √25²+(72-65)²

             = √625+7²

              =√625+49

             =  √674

             = 25.961 m

area of Trapezium = (1÷2) × sum of parallel side × distance between them

                                =  (1÷2) × (65+72) × 25.961

                                = 1778.3285 m²

Therefore cost of painting the wall = area of wall × cost

                                                          1778.3285×155

                                                          = 275640.9175 Rs or Paise

Step-by-step explanation: