Latest TCS Aptitude Question SOLUTION: if rs1000 be invested at interest rate 5% and the interest be added to the principle every 10yrs then the number of years in which it will amount to rs 2000 is

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if rs1000 be invested at interest rate 5% and the interest be added to the principle every 10yrs then the number of years in which it will amount to rs 2000 is

Asked In TCS ratna (11 years ago)

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Sarvesh Shukla  (11 years ago)

Ans- 16.6 yrs(approx 17 yrs)
P=1000, R=5% and T=10 years,(given)
so, SI= PRT/100, we get SI=500
Now, The new P is (1000+500)= 1500
so, P=1500, R=5%, T=? & SI=500 (to make 2000)
then, SI=PRT/100
so, 500=(1500*5*T)/100
T=20/3 =6.67 years
So total time= 10+6.67= 16.67 years (approx 17 years)

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Narendra Kulkarni  (11 years ago)

Using formula for simple interest, SI=PRT/100, we get, for P=1000, R=5 and T=10 years, SI=500. Then two spans of 10 years each are required so that the amount will be 2000; i.e. 1000+500(first 10 years)+500(second 10 years)=2000.
Thus, answer is 10+10=20 years.

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anand singh  (11 years ago)

interest is exceeded the 1000 in 6.67 year.. bt it will be added to principle amount in next 10th year.. so ans will be 20 years...
just lyk the interest is added in bank in march and sept month...

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