The floor of a rectangular hall has a perimeter of `250\ mdot` Its height is `6\ mdot` Find the cost of painting its four walls (including doors, etc.) at the rate of`\ R s .6\ p e r\ s q u a r e\ m e t r edot`

Explanation

Height of rectangular hall`=6 m`
Perimeter of floor of rectangular hall`=250m`
Perimeter of rectangle`=2(l+b)=250`
Area of four walls`=2(l+b)h`
Area of four wall`=250times6=1500 m^2`
`therefore` Cost of painting four walls`=ratetimesarea=Rs. 6times1500=Rs. 9000`