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Sadikur Rahaman

· started a discussion

· 1 Months ago

Shortcut required (Question: 232819.0 )

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Question:
If the compound interest on a sum for 2 years at \(12\cfrac{1}{2}\) % per annum is Rs.510, the simple interest on the same sum at the  same rate for the same period of time is: 
Options:
A) Rs.400
B) Rs.480
C) Rs.450
D) Rs.460
Solution:

Ans: (b)

Vikas Singh

· commented

· 1 Months ago

ci=si(1+r/200)

Arthur Yardley

· commented

· 1 Months ago

CI = P(r^2) + 2Pr
r=1/8
CI=P*17/64
SI=2Pr=2*(64/17*510)*1/8
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