Question

the simple intrest on a certain sum of money for 4 1/2 year at 8% p.a. is 540 more than the si on the sum for 5year at 6% p.a . Find the sum .
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Answer 1

Answer:

Let the sum borrowed be Z. Then,

(Zx6x2⁄100) + (Zx9x3⁄100) + (Zx14x4⁄100) = 11400

Therefore, 3Z⁄25 + 27Z⁄100 + 14Z⁄25) = 11400

? 95Z⁄100 = 11400

Z = (11400x100⁄95) = 12000