A rectangular lawn of dimensions 70 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?  Pick:
A) s . 3988
B) s . 3900
C) s . 3228
D) s . 3922
E) s . 3600

Rationale: "area = ( l + b – d ) d ( 70 + 60 – 10 ) 10 = > 1200 m 2 1200 * 3 = rs . 3600 answer : e"
Answer: E