Subject: mathqa
Question: a rectangular lawn of dimensions 120 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 ?
Option: 
A: s . 5100
B: s . 3900
C: s . 3922
D: s . 3928
Answer: A