question_answer

Two rectangular plots of length 40 m and width 20 m are as shown. What is the cost of fencing the plots at Rs. 4 per metre?

A) Rs. 16000           

B) Rs. 1600

C) Rs. 640  

D) Rs. 6400

Correct Answer: C

Solution :

  The rectangular plots shown form a square of side 40 m. \[\therefore \] Cost of fencing \[=4\times 40\times \]Rs. 4 = Rs. 640