A 12 m by 7 m rectangular garden needs fencing except for a 2 m gate. At Rs 80 per metre, what is the fencing cost?

Question: A 12 m by 7 m rectangular garden needs fencing except for a 2 m gate. At Rs 80 per metre, what is the fencing cost?

1. Rs 2960
2. Rs 2800
3. Rs 3040
4. Rs 2880

Correct Answer: D — Rs 2880

Explanation: Fence length is the rectangle perimeter 2(l + w) minus gate width; multiply by rate.
[2(12 + 7) − 2] × 80 = Rs 2880.