a rectangular lawn of dimensions 110 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 ?
"area = ( l + b – d ) d ( 110 + 60 – 10 ) 10 = > 1600 m 2 1600 * 3 = rs . 4800 answer : b"
multiply(multiply(subtract(add(110, 60), 10), 10), 3)