সুদ বার্ষিকভাবে চক্রবৃদ্ধি হলে 2 বছরে ₹4,800 পরিমাণ ₹5,043 হলে বার্ষিক সুদের হার কত?

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  1. 3%
  2. 2.0%
  3. 2.5%
  4. 5%

Answer (Detailed Solution Below)

Option 3 : 2.5%
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প্রদত্ত:

মূলধন = 4800 টাকা

সুদ আসল = 5043 টাকা

সময় = 2 বছর

ব্যবহৃত সূত্র:

A = P(1 + r/100)t

গণনা:

প্রশ্ন অনুযায়ী

A = P(1 + r/100)t

⇒ 5043 = 4800 × (1 + r/100)2

⇒ (1 + r/100)2 = (5043/4800)

⇒ (1 + r/100)2 = (1681/1600)

⇒ (1 + r/100)2 = (41/40)2

⇒ (100 + r)/100 = 41/40

⇒ (100 + r)/5 = 41/2

⇒ 200 + 2r = 205

⇒ 2r = (205 – 200)

⇒ 2r = 5

⇒ r = 2.5%

∴ সঠিক উত্তর হল বিকল্প (3)।

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