Question

Find the cost of whitewashing a trapezodial wall whose parallel sides are 65m and 72m and non parallel sides are equal to 250dm . Given , the rate of whitewashing is 5Rs /meter square​

Answer 1

Step-by-step explanation:

250dm = 25m height = [√{25² + {(72 - 65)/2}²] = √[625 + 12.25] = 25.24 m so, Area of trapezium = (1/2) × (65 + 72) × (25.24) = 1728.94 sq.m So, cost of white washing @Rs.5/sq.m = 1728.94/5 = Rs. 345.788