Problem: a rectangular lawn of dimensions 80 m * 60 m has two roads each 10 m wide running in the middle of the lawn , one parallel to the length and the other parallel to the breadth . what is the cost of traveling the two roads at rs . 3 per sq m ? 
Options: ['a ) rs . 3919', 'b ) rs . 3910', 'c ) rs . 3997', 'd ) rs . 3900', 'e ) rs . 3902']
d