11. What sum of money lent out at 5% for 3 years will produce the same interest as
* 900 lent out at 4% for 5 years ?
12. A sum of 1,780 becomes * 2,136 in 4 years.
Find: the rate of interest.
(ii) the sum that will become * 810 in 7 years at the same rate of interest
13. A sum amounts to * 2,652 in 6 years at 5% p.a. simple interest.
Find : (i) the sum
(ii) the time in which the same sum will double itself at the same rate of interest.
14. P and Q invest 36,000 and 25,000 respectively at the same rate of interest per
year. If at the end of 4 years, P gets 3,080 more interest than Q. find the rate of
interest
15. A sum of money is lent for 5 years at R% simple interest per annum. If the interest
earned be one-fourth of the money lent, find the value of R.
16. The simple interest earned on a certain sum in 5 years is 30% of the sum. Find the
rate of interest.
Answers
Answer:
hi
Step-by-step explanation:
11 ans.What sum of money lent out at 5℅ for 3 years will produce the same interest as Rs. 900 lent out at 4℅ for 5 years?
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4 Answers

Manish Nagdev, M.C.A from Vivekanand Education Society's Institute of Technology, Mumbai (2020)
Answered January 11, 2018
Originally Answered: What sum of money lent out at 5℅ for 3 years will produce the same interest as rs. 900 lent out at 4℅ for 5 years.?
Let’s first calculate the interest on ₹900 at 4% for 5 years,
here principal(p) = ₹900, roi(r) = 4% and period (n) = 5
calculating the Simple Interest…
SI = p*r*n/100
SI = 900*4*5/100
SI = ₹180
since the interest is same for both, we will take ₹180 as interest and calculate the sum/principal invested at the rate of 5% for the period of 3 years.
now, let the principal be ‘x’….
SI = ₹180, roi(r) = 5% and period(n) = 3 years
calculating the principal by the same Simple Interest formula we used earlier..
SI = p*n*r/100
180 = x*5*3/100
x = 180*100/5*3
x = 18000/15
x = ₹1200
so ₹1200 invested at rate of 5% for the period of 3 years will generate ₹180 as interest as before.
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