The perimeter of a rectangular field is 104 meters. If the length of the field is 10 meters more than twice the width, what is the area of that field in square meters?

A 530

B 532

C 580

D 588

E None

Solution

Correct Answer: Option B

মনেকরি,
      আয়তক্ষেত্রটির দৈর্ঘ্য = x
এবং আয়তক্ষেত্রটির  প্রস্থ = y

প্রশ্নমতে, 2(x+y) = 104

⇒ x+y = 52 ............ (i)

আবার, x = 2y + 10 ............. (ii)

∴ (i) ⇒ 
2y + 10 + y = 52
⇒ 3y = 42
⇒ y = 14
 
∴ (ii) ⇒
x = 2 × 14 + 10
   = 28 + 10
   = 38

∴ ক্ষেত্রফল = 38 × 14 = 532

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