If Rs. 450/- amount to Rs. 504/- in three years at simple interest, what will Rs. 650/- amount in 2 years & 6 months the interest rate being the same in both cases?

Created: 6 years ago | Updated: 2 years ago

Updated: 2 years ago

Rs. 715/-

Rs. 750/-

Rs. 725/-

Rs. 700/-

Bank Alfalah Ltd Bank Alfalah Ltd- MTOs Recruitment Test - 2005 গণিত সরল ও যৌগিক মুনাফা (Simple & Compound interest)

ব্যাখ্যা

Best Ans:

Here, 2 year 6 months = 2.5 years

Principal with simple interest, A = P( 1 + n r)

Now, 504 = 450( 1 + 3 × r)

or, 1 + 3r = 504/450

or, 3r = 504/450 - 1

or, 3r = (504 - 450) / 450

or, 3r = 54 / 450

or, r = 54 / (450 × 3)

or, r = 1/25

Again, A = 650( 1 + 2.5 × 1/25)

or, A = 650 × (25 + 2.5)/25

or, A = 650 × 27.5 / 25

So, A = 715 Rs.

6 years ago

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Md Azizur Rahman

Founder of Satt

সরল ও যৌগিক মুনাফা (Simple & Compound interest)