A rectangular plot has length 20 metres more than its breadth.\nThe total fencing cost at Rs 26.50 per metre is Rs 5300 (fencing all four sides).\nWhat is the length (in metres) of the plot?

Introduction / Context:
Cost of fencing equals cost per metre times perimeter. Translate cost into total perimeter, then solve the linear system given by the length–breadth relation and perimeter constraint.

Given Data / Assumptions:

• Cost = Rs 5300; rate = Rs 26.50/m.
• Perimeter P = 4-side fence.
• Length L = Breadth B + 20.

Concept / Approach:
Compute P from cost, then use P = 2(L + B) with L = B + 20 to find dimensions.

Step-by-Step Solution:

Verification / Alternative check:
Perimeter = 2(60 + 40) = 200 m; cost = 200 * 26.5 = Rs 5300.

Why Other Options Are Wrong:
The correct L is 60 m, which is not listed; thus “None of these” is correct.

Final Answer:
None of these (actual length = 60 m).