If the simple interest on Rs 2000 increases by Rs 40, when the time increases by 4 year. Find the rate per cent per annum.
If the simple interest on Rs 2000 increases by Rs 40, when the time increases by 4 year. Find the rate per cent per annum.
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Answer:
Case 1:
We know that,
I=PTR/100
x=2000×T×R/100
100x=2000×T×R−−−(1)
Case 2:
x+40=2000×T×(R+2)/100
⟹100(x+40)=2000RT+4000T
⟹100x+4000=2000RT+4000T
100x=2000RT+4000T−4000−−(2)
Now,
From(1)and(2),
we get
2000RT+4000T-4000=2000RT2000RT+4000T−4000=2000RT
⟹4000T=2000RT−2000RT+4000
⟹4000T=4000
⟹T=4000/4000
⟹T=1
Therefore,
Required time (T) = 1 year
Answer:
Hope this is helpful for you