Latest Syntel Aptitude Question SOLUTION: The compound interest for first and second years is 200 and 220 on a certain amount. Find the sum.

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(#M40003507) SYNTEL Numerical Ability question SYNTEL MATHS PUZZLE Keep an EYE

The compound interest for first and second years is 200 and 220 on a certain amount. Find the sum.

Asked In Syntel t.venkat rao (13 years ago)

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Dr.Dipin Singh  (13 years ago)

Sum = Rs 2000.

The compound interest for first and second years is 200 and 220 on a certain amount.
In second year, Rs 20 is simple interest on Rs 200 which is interest for one year on principal sum.
So rate of interest = 20*100/200 = 10%
Principal = 200*100/10*1= Rs 2000.

Is this solution Helpfull? Yes (33) | No (6)  

DEBARSHI DALAI  (13 years ago)

compound interest is INTEREST on INTEREST.therefore ,we can calculate the rate of interest ,by calculating the rate of interest in the compound interest.
therefore , Rate of interest = [(220-200)/200]* 100 = 10 %
let the amount be A, the interest at the rate of 10% is 200 in the first year,
therefore [A*(10/100)]=200, therefore A = 2000 (ans)

Is this solution Helpfull? Yes (15) | No (4)  

shashi kumar  (13 years ago)

p((1+r/100)^2-1))=220
p((1+r/100)^1-1))=200
solving,these two equatns....
we get,p=64.5

Is this solution Helpfull? Yes (2) | No (42)  

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