Postal
Government Jobs Exams
Numerical Ability
A sum of money becomes 5 1/2 times in 30 years at simple interest.Find the rate of interest?
(a)10%
(b)15%
(c)12%
(d)18%
Read Solution (Total 3)
-
- 15%
Amount A = P + PNR/100 , where P-->principal ,R-->rate and T-->time
Amount becomes 5 1/2 times principal
A = 11/2*P
11/2*P = P + PNR/100
11/2 = 1 + 30*R/100
3*R/10 = 9/2
R = 15%
- 10 years agoHelpfull: Yes(3) No(0)
- Amount A = P+I
where
P --> principal
I-->Interest
and I = PNR/100
N -->number of years
R--=> Rate of interest
So, A = P + PNR/100
- 10 years agoHelpfull: Yes(2) No(0)
- Why in formula P+PNR/100?
- 10 years agoHelpfull: Yes(0) No(0)
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