the length of a rectangular plot is 20 metres more than its breadth . if the cost of fencing the plot @ rs . 26.50 per metre is rs . 4240 , what is the length of the plot in metres ?
"let length of plot = l meters , then breadth = l - 20 meters and perimeter = 2 [ l + l - 20 ] = [ 4 l - 40 ] meters [ 4 l - 40 ] * 26.50 = 4240 [ 4 l - 40 ] = 4240 / 26.50 = 160 4 l = 200 l = 200 / 4 = 50 meters . answer : c"
subtract(divide(divide(4240, 26.50), const_2), multiply(const_2, 20))