Mr. Rashid is a vegetable farmer. His neighbor's goat regularly enters his vegetable garden and destroys his vegetables. To protect his vegetables Mr. Rashid wants to put up fencing around three sides of his rectangular yard and leave a side of 20 feet unfenced as that side is facing the canal and needs no fence. If the garden has an area of 680 square feet, how many feet of fencing does he need?
সমাধান
সঠিক উত্তর: Option D
ধরি, বাগানের এক দিক = x feet
আয়তক্ষেত্রের ক্ষেত্রফল = দৈর্ঘ্য × প্রস্থ
প্রশ্নমতে, ২০ × x =৬৮০
x=৩৪
তাকে বেড়া দিতে হবে = ৩৪+২০+৩৪ =৮৮ ফুট
