RRB NTPC Prelims Model Paper 3 with solutions

Question : 99 of 100

Marks: +1, -0

I gave some money at simple interest and at the end of 10 years got back twice the sum. The rate % per annum was

Solution:

(3) Rate =

(n-1 )/t×100

∴t=10 years
n=2

∴r={(2-1)×100}/10

r={1× 100}/10

;r = 10%

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