What is the minimum number of square marbles required to tile a floor of length 5 metres 78 cm and width 3 metres 74 cm?

The parellel sides of an isosceles trapezium are 21 cm & 9 cm length & a lateral side is 10 cm. Find its area

There is a circle of radius 1 cm. Each member of a sequence of regularpolygon P₁(n), n = 5, 6...., Where n is the number of sides of polygon iscircumscribing the circle and each member of a sequence of regular polygonP₂(n), n = 4, 5.. where n is the number of sides of a polygon, is incribedin the circle. Let L₁(n) & L₂(n) denote the perimeter of the correspondingpolygons P₁(n)& P₂(n). let X=L₁(13)+2∏/L₂(17) Then