Length of a rectangular plot is 40 mtr more than its breadth. If the cost of fencin g the plot at 26.50 per meter is Rs. 5300, what is the length of the plot in mtr?
Choose the correct choice from the following answers:
A) 46 m
B) 60 m
C) 58 m
D) 70 m
E) 80 m

Rationale: "let breadth = x metres . then , length = ( x + 40 ) metres . perimeter = 5300 / 26.5 m = 200 m . 2 [ ( x + 40 ) + x ] = 200 2 x + 40 = 100 2 x = 60 x = 30 . hence , length = x + 40 = 70 m d"
Answer: D